शरदकालीन अवकाश गहकाय क ा दसवी

१. सी बी एस ई ारा िदए गए सपल पपर ( प ) को िल खए। २. ’रस’ क कार, उदाहरण सिहत िल खए। ३. अखबार क िलए तीन िवषयो पर िव ापन तयार कर।

*******

Page 1 of 14

Class- X Session- 2020-21

Subject- Mathematics -Standard

Sample Question Paper

Time Allowed: 3 Hours Maximum Marks: 80

General Instructions:

1. This question paper contains two parts A and B.

2. Both Part A and Part B have internal choices.

Part – A:

1. It consists three sections- I and II.

2. Section I has 16 questions of 1 mark each. Internal choice is provided in 5 questions.

3. Section II has 4 questions on case study. Each case study has 5 case-based sub-parts. An

examinee is to attempt any 4 out of 5 sub-parts.

Part – B:

1. Question No 21 to 26 are Very short answer Type questions of 2 mark each,

2. Question No 27 to 33 are Short Answer Type questions of 3 marks each

3. Question No 34 to 36 are Long Answer Type questions of 5 marks each.

4. Internal choice is provided in 2 questions of 2 marks, 2 questions of 3 marks and 1 question of 5

marks.

Question

No.

Part-A

Marks

allocated

Section-I

Section I has 16 questions of 1 mark each. Internal choice is provided

in 5 questions.

1 If xy=180 and HCF(x,y)=3, then find the LCM(x,y).

OR

The decimal representation of 14587

21 × 54 will terminate after how many decimal

places?

1

2 If the sum of the zeroes of the quadratic polynomial 3x2-kx+6 is 3, then find

the value of k.

1

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3. For what value of k, the pair of linear equations 3x+y=3 and 6x+ky=8 does

not have a solution.

1

4. If 3 chairs and 1 table costs Rs. 1500 and 6 chairs and 1 table costs Rs.2400. Form linear equations to represent this situation.

1

5. Which term of the A.P. 27, 24, 21,…..is zero?

OR

In an Arithmetic Progression, if d= - 4, n=7,an=4, then find a.

1

6. For what values of k, the equation 9x2+6kx+4=0 has equal roots?

7.

Find the roots of the equation x2+7x+10=0

OR

For what value(s) of ‘a’ quadratic equation 30 𝑎𝑥2 − 6𝑥 + 1 = 0 has no real

roots?

1

8. If PQ=28cm, then find the perimeter of ∆PLM

1

9. If two tangents are inclined at 60˚ are drawn to a circle of radius 3cm then

find length of each tangent.

OR

PQ is a tangent to a circle with centre O at point P. If ∆OPQ is an isosceles

triangle, then find ∠OQP.

1

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10. In the ∆ABC, D and E are points on side AB and AC respectively such that

DE II BC. If AE=2cm, AD=3cm and BD=4.5cm, then find CE.

1

11. In the figure, if B1, B2, B3,…... and A1,A2, A3,….. have been marked at

equal distances. In what ratio C divides AB?

1

12. 𝑆𝑖𝑛 𝐴 + 𝐶𝑜𝑠 𝐵 = 1, 𝐴 = 30° and B is an acute angle, then find the value of B. 1

13. If x=2sin2Ɵ and y=2cos2Ɵ+1, then find x+y

1

14. In a circle of diameter 42cm,if an arc subtends an angle of 60˚ at the centre

where ∏=22/7, then what will be the length of arc.

1

15. 12 solid spheres of the same radii are made by melting a solid metallic

cylinder of base diameter 2cm and height 16cm. Find the diameter of the

each sphere.

1

16. Find the probability of getting a doublet in a throw of a pair of dice.

OR

1

Page 4 of 14

Find the probability of getting a black queen when a card is drawn at random

from a well-shuffled pack of 52 cards.

Section-II

Case study based questions are compulsory. Attempt any four sub

parts of each question. Each subpart carries 1 mark

17. Case Study based-1

SUN ROOM

The diagrams show the plans for a sun room. It will be built onto the wall of a

house. The four walls of the sunroom are square clear glass panels. The roof

is made using

• Four clear glass panels, trapezium in shape, all the same size

• One tinted glass panel, half a regular octagon in shape

(a) Refer to Top View

Find the mid-point of the segment joining the points J (6, 17) and I (9, 16).

(i) (33/2,15/2)

(ii) (3/2,1/2)

(iii)(15/2,33/2)

(iv) (1/2,3/2)

1

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(b) Refer to Top View

The distance of the point P from the y-axis is

(i) 4

(ii) 15

(iii) 19

(iv) 25

1

(c) Refer to Front View

The distance between the points A and S is

(i) 4

(ii) 8

(iii)16

(iv)20

1

(d) Refer to Front View

Find the co-ordinates of the point which divides the line segment joining the

points A and B in the ratio 1:3 internally.

(i) (8.5,2.0)

(ii) (2.0,9.5)

(iii) (3.0,7.5)

(iv) (2.0,8.5)

1

(e) Refer to Front View

If a point (x,y) is equidistant from the Q(9,8) and S(17,8),then

(i) x+y=13

(ii) x-13=0

(iii) y-13=0

(iv)x-y=13

1

18. Case Study Based- 2

SCALE FACTOR AND SIMILARITY

SCALE FACTOR

A scale drawing of an object is the same shape as the object but a different

size.

The scale of a drawing is a comparison of the length used on a drawing to

the length it represents. The scale is written as a ratio.

SIMILAR FIGURES

The ratio of two corresponding sides in similar figures is called the scale

factor.

Scale factor = 𝑙𝑒𝑛𝑔𝑡ℎ 𝑖𝑛 𝑖𝑚𝑎𝑔𝑒

𝑐𝑜𝑟𝑟𝑒𝑠𝑝𝑜𝑛𝑑𝑖𝑛𝑔 𝑙𝑒𝑛𝑔𝑡ℎ 𝑖𝑛 𝑜𝑏𝑗𝑒𝑐𝑡

If one shape can become another using Resizing then the

shapes are Similar

Th

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Th

Rotation or Turn

Reflection or Flip

Translation or Slide

Hence, two shapes are Similar when one can become the other after

a resize, flip, slide or turn.

(a) A model of a boat is made on the scale of 1:4. The model is 120cm long. The

full size of the boat has a width of 60cm. What is the width of the scale

model?

(i) 20 cm

(ii) 25 cm

(iii) 15 cm

(iv)240 cm

1

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(b) What will effect the similarity of any two polygons?

(i) They are flipped horizontally

(ii)They are dilated by a scale factor

(iii)They are translated down

(iv)They are not the mirror image of one another

1

(c) If two similar triangles have a scale factor of a: b. Which statement regarding

the two triangles is true?

(i)The ratio of their perimeters is 3a : b

(ii)Their altitudes have a ratio a:b

(iii)Their medians have a ratio 𝑎

2 : b

(iv)Their angle bisectors have a ratio a2 : b2

1

(d) The shadow of a stick 5m long is 2m. At the same time the shadow of a tree

12.5m high is

(i)3m

(ii)3.5m

(iii)4.5m

(iv)5m

1

(e) Below you see a student's mathematical model of a farmhouse roof with

measurements. The attic floor, ABCD in the model, is a square. The beams

that support the roof are the edges of a rectangular prism, EFGHKLMN. E is

the middle of AT, F is the middle of BT, G is the middle of CT, and H is the

middle of DT. All the edges of the pyramid in the model have length of 12 m.

1

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What is the length of EF, where EF is one of the horizontal edges of the

block?

(i)24m

(ii)3m

(iii)6m

(iv)10m

19.

Case Study Based- 3

Applications of Parabolas-Highway Overpasses/Underpasses

A highway underpass is parabolic in shape.

Parabola

A parabola is the graph that

results from p(x)=ax2+bx+c

Parabolas are symmetric

about a vertical line known

as the Axis of Symmetry.

The Axis of Symmetry runs

through the maximum or

minimum point of the

parabola which is called the

Page 9 of 14

Vertex

(a) If the highway overpass is represented by x2–2x –8. Then its zeroes are

(i) (2,-4)

(ii) (4,-2)

(iii) (-2,-2)

(iv) (-4,-4)

(b) The highway overpass is represented graphically.

Zeroes of a polynomial can be expressed graphically. Number of zeroes of

polynomial is equal to number of points where the graph of polynomial

(i) Intersects x-axis

(ii) Intersects y-axis

(iii) Intersects y-axis or x-axis

(iv)None of the above

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(c) Graph of a quadratic polynomial is a

(i) straight line

(ii) circle

(iii)parabola

(iv)ellipse

(d) The representation of Highway Underpass whose one zero is 6 and sum of

the zeroes is 0, is

(i)x2 – 6x + 2

(ii) x2 – 36

(iii)x2 – 6

(iv)x2 – 3

(e) The number of zeroes that polynomial f(x) = (x – 2)2 + 4 can have is:

(i)1

(ii) 2

(iii) 0

(iv) 3

20. Case Study Based- 4

100m RACE

A stopwatch was used to

find the time that it took a

group of students to run 100

m.

Time

(in sec)

0-20 20-40 40-60 60-80 80-100

No. of

students

8 10 13 6 3

Page 11 of 14

(a) Estimate the mean time taken by a student to finish the race.

(i)54

(ii)63

(iii)43

(iv)50

(b) What wiil be the upper limit of the modal class ?

(i)20

(ii)40

(iii)60

(iv)80

(c) The construction of cummulative frequency table is useful in determining the

(i)Mean

(ii)Median

(iii)Mode

(iv)All of the above

(d) The sum of lower limits of median class and modal class is

(i)60

(ii)100

(iii)80

(iv)140

(e) How many students finished the race within 1 minute?

(i)18

(ii)37

(iii)31

(iv)8

Part –B

All questions are compulsory. In case of internal choices, attempt any

one.

21. 3 bells ring at an interval of 4,7 and 14 minutes. All three bell rang at 6 am,

when the three balls will the ring together next?

2

22. Find the point on x-axis which is equidistant from the points (2,-2) and (-4,2)

OR

2

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P (-2, 5) and Q (3, 2) are two points. Find the co-ordinates of the point R on

PQ such that PR=2QR

23. Find a quadratic polynomial whose zeroes are 5-3√2 and 5+3√2.

2

24. Draw a line segment AB of length 9cm. With A and B as centres, draw

circles of radius 5cm and 3cm respectively. Construct tangents to each circle

from the centre of the other circle.

2

25. If tanA=3/4, find the value of 1/sinA+1/cosA

OR

If √3 sinƟ-cosƟ=0 and 0˚<Ɵ <90˚, find the value of Ɵ

2

26. In the figure, quadrilateral ABCD is circumscribing a circle with centre O

and AD⊥AB. If radius of incircle is 10cm, then the value of x is

2

27.. Prove that 2-√3 is irrational, given that √3 is irrational.

3

28. If one root of the quadratic equation 3x2+px+4=0 is 2/3, then find the value

of p and the other root of the equation.

OR

The roots α and β of the quadratic equation x2-5x+3(k-1)=0 are such that α-

β=1. Find the value k.

3

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29. In the figure, ABCD is a square of side 14 cm. Semi-circles are drawn with

each side of square as diameter. Find the area of the shaded region.

3

30. The perimeters of two similar triangles are 25cm and 15cm respectively. If

one side of the first triangle is 9cm, find the length of the corresponding side

of the second triangle.

OR

In an equilateral triangle ABC, D is a point on side BC such that BD = 1/3

BC. Prove that 9 AD2 = 7 AB2

3

31. The median of the following data is 16. Find the missing frequencies a and b,

if the total of the frequencies is 70.

Class 0-5 5-10 10-15 15-20 20-25 25-30 30-35 35-40

Frequency 12 a 12 15 b 6 6 4

3

32.

If the angles of elevation of the top of the candle from two coins distant ‘a’

cm and ‘b’ cm (a>b) from its base and in the same straight line from it are

30˚ and 60˚, then find the height of the candle.

3

Page 14 of 14

Section V

33. The mode of the following data is 67. Find the missing frequency x.

Class 40-50 50-60 60-70 70-80 80-90

Frequency 5 x 15 12 7

3

34.

The two palm trees are of equal heights and are standing opposite each

other on either side of the river, which is 80 m wide. From a point O

between them on the river the angles of elevation of the top of the trees

are 60° and 30°, respectively. Find the height of the trees and the

distances of the point O from the trees.

OR

The angles of depression of the top and bottom of a building 50 meters

high as observed from the top of a tower are 30˚ and 60˚ respectively.

Find the height of the tower, and also the horizontal distance between the

building and the tower.

5

35. Water is flowing through a cylindrical pipe of internal diameter 2cm, into a

cylindrical tank of base radius 40 cm at the rate of 0.7m/sec. By how

much will the water rise in the tank in half an hour?

5

36. A motorboat covers a distance of 16km upstream and 24km downstream

in 6 hours. In the same time it covers a distance of 12 km upstream and

36km downstream. Find the speed of the boat in still water and that of the

stream.

5

Page 1 of 11

Class- X

Mathematics-Basic (241)

Sample Question Paper 2020-21

Max. Marks: 80 Duration:3 hours

General Instructions:

1. This question paper contains two parts A and B.

2. Both Part A and Part B have internal choices.

Part – A:

1. It consists of two sections- I and II

2. Section I has 16 questions. Internal choice is provided in 5 questions.

3. Section II has four case study-based questions. Each case study has 5 case-based sub-parts.

An examinee is to attempt any 4 out of 5 sub-parts.

Part – B:

1. Question No 21 to 26 are Very short answer Type questions of 2 mark each,

2. Question No 27 to 33 are Short Answer Type questions of 3 marks each

3. Question No 34 to 36 are Long Answer Type questions of 5 marks each.

4. Internal choice is provided in 2 questions of 2 marks, 2 questions of 3 marks and 1 question of 5

marks.

Questi

on No.

Part-A

Marks

Section-I

1.

Express 156 as the product of primes.

1

2.

Write a quadratic polynomial, sum of whose zeroes is 2 and product is -8.

1

3. Given that HCF (96,404) is 4, find the LCM ( 96,404).

OR

State the fundamental Theorem of Arithmetic.

1

Page 2 of 11

4 On comparing the ratios of the coefficients, find out whether the pair of equations x – 2y =0 and 3x + 4y -20 =0 is consistent or inconsistent.

1

5 If a and b are co-prime numbers, then find the HCF (a, b).

1

6 Find the area of a sector of a circle with radius 6cm if angle of the sector is 60°. (Take 𝜋 = 22/7)

OR

A horse tied to a pole with 28m long rope. Find the perimeter of the field where the horse can graze. (Take 𝜋 = 22/7)

1

7 In the given fig. DE || BC, ∟ADE =70° and ∟BAC=50°, then angle ∟BCA = ______

OR

In the given figure, AD = 2cm, BD = 3 cm, AE = 3.5 cm and AC = 7 cm. Is DE parallel to BC ?

1

Page 3 of 11

8 The cost of fencing a circular field at the rate of Rs.24 per metre is Rs. 5280. Find the radius of the field.

1

9 A tree breaks due to storm and the broken part bends so that the top of the tree touches the ground where it makes an angle 30° . The distance between the foot of the tree to the point where the top touches the ground is 8m. Find the height of the tree from where it is broken.

1

10 If the perimeter and the area of a circle are numerically equal, then find the radius of the circle

1

11 Write the empirical relationship among mean, median and mode. 1

12 To divide a line segment BC internally in the ratio 3 : 5, we draw a ray BX such that ∠CBX is an acute angle. What will be the minimum number of points to be located at equal distances, on ray BX?

1

13 For what values of p does the pair of equations 4x + p y +8 =0 and 2x +2y +2 =0 has unique solution?

OR

What type of straight lines will be represented by the system of equations 2x + 3y =5 and 4x + 6y = 7 ?

1

14 A bag contains 3 red balls and 5 black balls. A ball is drawn at random from

the bag. What is the probability that the ball drawn is red?

OR

A die is thrown once. What is the probability of getting a prime number?

1

15 A tower stands vertically on the ground. From a point on the ground, which is

15m away from the foot of the tower, the angle of elevation of the top of the

tower is found to be 60°.Find the height of the tower.

1

16

Probability of an event E + Probability of the event E ( not E) is,_______

1

Page 4 of 11

Section-II

Case study-based questions are compulsory. Attempt any 4 sub parts

from each question. Each question carries 1 mark

17

Mathematics teacher of a school took her 10th standard students to show Red

fort. It was a part of their Educational trip. The teacher had interest in history

as well. She narrated the facts of Red fort to students. Then the teacher said

in this monument one can find combination of solid figures. There are 2 pillars

which are cylindrical in shape. Also 2 domes at the corners which are

hemispherical.7 smaller domes at the centre. Flag hoisting ceremony on

Independence Day takes place near these domes.

i) How much cloth material will be required to cover 2 big domes each of radius

2.5 metres? (Take 𝜋 = 22/7)

a) 75m2 b) 78.57m2 c) 87.47m2 d) 25.8m2

b)

1

ii) Write the formula to find the volume of a cylindrical pillar.

a) Πr2h b) Πrl c) Πr(l + r) d) 2Πr

1

iii) Find the lateral surface area of two pillars if height of the pillar is 7m and

radius of the base is 1.4m.

a) 112.3cm2 b) 123.2m2 c) 90m2 d) 345.2cm2

1

iv) How much is the volume of a hemisphere if the radius of the base is 3.5m?

a) 85.9 m3 b) 80 m3 c) 98 m3 d) 89.83 m3

1

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v) What is the ratio of sum of volumes of two hemispheres of radius 1cm each to

the volume of a sphere of radius 2 cm?

a) 1:1 b) 1:8 c) 8 :1 d) 1:16

1

18 Class X students of a secondary school in Krishnagar have been allotted a

rectangular plot of a land for gardening activity. Saplings of Gulmohar are

planted on the boundary at a distance of 1m from each other. There is a

triangular grassy lawn in the plot as shown in the fig. The students are to sow

seeds of flowering plants on the remaining area of the plot.

Considering A as origin, answer question (i) to (v)

i) Considering A as the origin, what are the coordinates of A?

a) (0,1) b) (1,0) c) (0,0) d)(-1,-1)

1

ii) What are the coordinates of P?

a) (4,6) b)( 6,4) c) (4,5) d) (5,4)

1

iii) What are the coordinates of R?

a) (6,5) b) (5,6) c) ( 6,0) d) (7,4)

1

iv) What are the coordinates of D?

a) (16,0) b) (0,0) c) (0,16) d) (16,1)

1

v) What are the coordinate of P if D is taken as the origin?

a) ( 12,2) b ) (-12,6) c) (12,3) d) (6,10)

1

Page 6 of 11

19

Rahul is studying in X Standard. He is making a kite to fly it on a Sunday. Few

questions came to his mind while making the kite. Give answers to his

questions by looking at the figure.

i) Rahul tied the sticks at what angles to each other?

a) 30° b) 60° c) 90° d) 60°

1

ii) Which is the correct similarity criteria applicable for smaller triangles at the

upper part of this kite?

a) RHS b) SAS c) SSA d) AAS

1

iii) Sides of two similar triangles are in the ratio 4:9. Corresponding medians of

these triangles are in the ratio,

a) 2:3 b) 4:9 c) 81:16 d) 16:81

1

iv) In a triangle, if square of one side is equal to the sum of the squares of the

other two sides, then the angle opposite the first side is a right angle. This

theorem is called as,

a) Pythagoras theorem b) Thales theorem

c) Converse of Thales theorem d) Converse of Pythagoras theorem

1

v) What is the area of the kite, formed by two perpendicular sticks of length 6 cm

and 8 cm?

a) 48 cm2 b) 14 cm2 c) 24 cm2 d) 96 cm2

1

Page 7 of 11

20 Due to heavy storm an electric wire got bent as shown in the figure. It followed

a mathematical shape. Answer the following questions below.

i) Name the shape in which the wire is bent

a) Spiral b) ellipse c) linear d) Parabola

1

ii) How many zeroes are there for the polynomial (shape of the wire)

a) 2 b) 3 d) 1 d) 0

1

iii) The zeroes of the polynomial are

a) -1, 5 b) -1, 3 c) 3, 5 d) -4, 2

1

iv) What will be the expression of the polynomial?

a) x2+2x -3 b) x2 -2x +3 c) x2 - 2x -3 d) x2 +2x+3

1

v) What is the value of the polynomial if x = -1?

a) 6 b) -18 c)) 18 d) 0

1

Part –B

All questions are compulsory. In case of internal choices, attempt

anyone.

21 Find the coordinates of the point which divides the line segment joining the

points (4, -3) and (8,5) in the ratio 3:1 internally.

2

Page 8 of 11

OR

Find a relation between x and y such that the point (x,y) is equidistant from the

points (7,1) and (3,5)

22

In the fig. if LM II CB and LN II CD, prove that AM

MB =

AN

ND

2

23 A quadrilateral ABCD is drawn to circumscribe a circle. Prove that AB + CD =

AD + BC.

2

24 Draw a line segment of length 7.8 cm and divide it in the ratio 5:8. Measure

the two parts.

2

25 Given 15 cot A =8, find sin A and sec A.

OR

Find tan P – cot R

2

Page 9 of 11

26 How many terms of the A. P : 9,17,25, .......must be taken to give a sum 636?

2

Part –B

All questions are compulsory. In case of internal choices, attempt

anyone.

27 Prove that √3 is an irrational number.

3

28 Two tangents TP and TQ are drawn to a circle with centre O from an external

point T. Prove that ∟PTQ = 2∟OPQ.

3

29 Meena went to a bank to withdraw Rs.2,000. She asked the cashier to give

her Rs.50 and Rs.100 notes only. Meena got 25 notes in all. Find how many

notes of Rs.50 and Rs.100 she received.

3

30 A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn

at random from the box, find the probability that it bears

(i) a two-digit number

(ii) a perfect square number.

(iii) a number divisible by 5.

OR

One card is drawn from a well shuffled deck of 52 cards. Find the probability of

getting

(i) A king of red colour.

(ii) A spade

(iii) The queen of diamonds

3

31 Metallic spheres of radii 6cm, 8cm and 10cm respectively are melted to form a

solid sphere. Find the radius of the resulting sphere.

3

Page 10 of 11

32 Prove that

sin A−cosA+1

sinA+cosA−1 =

1

secA−tanA

3

33 A motor boat whose speed in still water is 18 km/h, takes 1 hour more to go 24

km upstream than to return downstream to the same spot. Find the speed of

the stream.

OR

Find two consecutive odd positive integers, sum of whose squares is 290.

3

Part –B

All questions are compulsory. In case of internal choices, attempt

anyone.

34 The angles of depression of the top and bottom of a 8m tall building from the

top of a multi storied building are 30° and 45°, respectively. Find the height of

the multi storied building and the distance between the two buildings.

OR

A 1.2m tall girl spots a balloon moving with the wind in a horizontal line at a

height 88.2 m from the ground. The angle of elevation of the balloon from the

eyes of the girl at any instant is 60°.After sometime, the angle of elevation

reduces 30°.Find the distance travelled by the balloon during the interval.

5

35

The pth, qth and rth terms of an A.P. are a, b and c respectively.

Show that a(q – r) + b(r-p) + c(p – q) = 0

5

Page 11 of 11

36 A survey regarding the heights in (cm) of 51 girls of class X of a school was

conducted and the following data was obtained. Find the median height and

the mean using the formulae.

Height (in cm) Number of Girls

Less than 140 4

Less than 145 11

Less than 150 29

Less than 155 40

Less than 160 46

Less than 165 51

5

Module 1

CLASS IX READING LITERACY

PART A Musical Instruments to Play

A musical instrument is a device created to make musical sounds. Anything that makes a sound can be used as a musical instrument. The history of musical instruments goes back to the beginning of culture. People first used instruments as ritual: a hunter might use a trumpet to signal a successful hunt; a drum might be used in a religious ceremony.

Cultures later composed and performed a set of sounds called a melody for entertainment. Musical instruments were needed. Some historians report that the earliest musical instrument was a simple flute. Many of the earliest musical instruments were made from animal skins, bone, wood, and other non-durable materials. Musical instruments were developed separately in the different countries and regions of the world, but when civilizations shared information amongst themselves, the development of instruments spread. For example, cultures of North America, South America, and Central America used similar instruments and shared these ideas of making instruments that were alike in some way.

Many different ways have been used to classify instruments over the years. One way to classify instruments is to put them in groups by the range of music the instruments can play. Another classification is to put them together by what they are made out of. However, the most common method of grouping instruments is by how they produce sounds. The academic study of musical instruments is called organology. Woodwinds and brass (sometimes called the “wind” instruments), string, percussion, electric, and keyboard are types of instruments grouped according to how they are made and the range of music and sounds they play.

Woodwind and brass instruments include the trumpet, clarinet, flute, oboe, trombone, tuba, and harmonica. Stringed instruments include the banjo, guitar, harp, violin, and viola. Percussion instruments include the cymbal, chime, timpani, drum, and tambourine. Electronic instruments are the keyboard and the synthesizer. Keyboard instruments include the accordion, organ, and piano. Maybe you will play an instrument someday. Will it be a woodwind or brass, stringed, percussion, electronic or a keyboard instrument?

A. Matching. Draw a line to connect which musical instruments belong to the categories listed in the story.

1. woodwind and brass a) banjo, guitar, harp

2. stringed b) trumpet, clarinet, flute

3. percussion c) keyboard, synthesizer

4. keyboard d) accordion, organ, piano

5. electronic e) cymbal, chime, drum

pg. 1

B. Phonics work.

The word “electronic” in the story ends in the letters “ic” that make a short “i” sound followed by a “k” sound. Write another word that has the “ic” letters to make the “ik” sound (a short i followed by the k sound).

_

The letter “y” in the word “history” is changed to “i” when adding the suffix “an”, which means “of”. So a “historian” is someone “of history”, an “Italian” is someone “of Italy”, etc. Write another word that has the “an” suffix. Write what the word means.

_

_

_

C. Crossword. Use these words to solve the musical clues:

device, signal, ceremony, composed, performed, melody, classify, range

Across

1. formed; made up of

5. something invented, devised, fitted

6. sweet music

7. played

Down 1. to group according to some system

2. a sign giving warning or notice

3. the distance between; extent

4. a special act done on special occasions

D. Multiple-Choice Questions (Circle the correct answer.)

pg. 2

1. The text mentions that musical instruments are made out of all of these materials except _.

a. animal skin

b. bone

c. rock

d. wood

2. According to the text, what is the most common way of grouping instruments?

a. by range of music played

b. what they are made out of

c. how they look

d. how they produce sounds

3. According to the text, what was the earliest reported instrument?

a. a simple piano

b. a simple flute

c. a simple guitar

d. a simple harp

E. Extended Response (Answer in complete sentences.)

1. How does the text define “musical instrument”?

_

_ _

_ _

2. Explain at least two ways early instruments were used.

_

_

_ _

_ _

3. What did early cultures of people do to foster and encourage music?

_

_

_ _

_ _

pg. 3

4. Name two instruments which you think were first played in your country.

_

_

F. Write the word from para 2 which means the same as ‘similar’.

_ PART B This is an advertisement in the form of a poster.

1. Who do you think has paid for this poster?

…………………………………………………………………………………………………………………………..

2. Why has the teacher got these posters made?

…………………………………………………………………………………………………………………………..

…………………………………………………………………………………………………………………………..

3. What is her contact no.?

…………………………………………………………………………………………………………………………..

4. What makes the teacher special? a) ……………………………………………………………………………………………………………………… b) ……………………………………………………………………………………………………………………… 5. If you were in her place, what would you do to promote your classes?

…………………………………………………………………………………………………………………………..

…………………………………………………………………………………………………………………………..

6. Name three places in the school where you think this poster should be displayed.

pg. 4

…………………………………………………………………………………………………………………………..

…………………………………………………………………………………………………………………………..

PART C This is the location of a musical instrumental store:

Furtados 234 Google reviews

Musical instrument store in Chandigarh, India

Address: S.C.F. No - 21, Ground Floor Inner Market, Sector 7-C, Chandigarh, 160019 Hours:

Closed ⋅ Opens 10:30AM

Thanks for your feedback. Phone: 0172 437 1675 Website: http://www.furtadosonline.com/ Category: Musical instrument store Suggest an edit Questions & answers

Q: Can I get musical instruments by credit card? A: Yes

Based on the visual input and the given information, answer the following questions.

Q.1. Which musical instrument store is being highlighted here?

………………………………………………………………………………………………….

Q.2. What is the address of this music store?

………………………………………………………………………………………………….

………………………………………………………………………………………………….

Q.3. In case of a query, how would you contact the store?

a)…………………………………………………………………………………………… pg. 5

Ask a question

Tuesday 10:30am–8pm

Wednesday 10:30am–8pm

Thursday 10:30am–8pm

Saturday 10:30am–8pm

Sunday 10:30am–8pm

Monday 10:30am–8pm

b) …………………………………………………………………………………………..

Q.4. You are in Sector 17 right now and have to buy a guitar urgently. Which store would you go to? Why?

………………………………………………………………………………………………….

………………………………………………………………………………………………….

………………………………………………………………………………………………….

………………………………………………………………………………………………….

Q.5. When is the store closed for the whole day?

Why do you think it is not closed on the weekend?

………………………………………………………………………………………………….

………………………………………………………………………………………………….

………………………………………………………………………………………………….

………………………………………………………………………………………………….

………………………………………………………………………………………………….

…………………………………………………………………………………………………. PART D

If you could play any instrument, what would it be? Why do you think you would choose that particular instrument?

_

_

_ _

_ _

_

_

_ _

_

pg. 6

Module 2

Critical And Creative Thinking Sub: English Class : X

Here’s a timeline sharing important information about various social media platforms. Let’s have a look and answer the questions followed.

1. The time line depicts the

2. the oldest social media platform whereas and

form the most recent ones.

3. is the most famous platform used by politicians, celebs,

sportsmen, actors and artists to express their views.

4. The two most important things required to make account on above platforms

are and

5. Mention any two disadvantages of using these social networking sites.

6. The lens like symbol is an icon of social networking site.

7. The speed of the internet is measured in .

8. The followers of a celebrity are increasing at the rate of 25% per week. The present no. of followers are 45000.What will be the total no. of followers after three weeks?

9. In order to verify that you are not a robot, many websites provide a

(Captcha/ Finger Print Sacnning/Color/Retina Sacnning) code to fill in.

10. Mention any two situations when government of India debarred the internet services in certain states for a short period of time and give reason.

Module 3

Class : IX, Subject : English CCT ACTIVITY Q1. See the picture and answer the questions that follow.

a) A day at the Summer camp starts with……………………….. .

i) prayer

ii) physical activities

iii) no fixed activities

iv) singing and painting

b) Reporting time and pick up time are ……………………….. . i) 9 am and 5pm

ii) 9 am and 4.30 pm

iii) 8 am and 5 pm

iv) 8 am and 4.30 pm

c) 11 am on Friday, the child would be ……………………….. .

i) at the Pacific Community Pool

ii) park

iii) taking dance lessons

iv) enjoying the field trip

d) A group of 7 students enrolled themselves for 3 days, how much fees did they pay?

e) How do such camps benefit a student’s health? ( give one reason)

f) What is the compulsory instruction of the camp officials regarding payment?

g) If the camp organiser wishes to organise a Spell Bee Competition, which days would he keep in mind?

Module 4

CLASS IX MATHS

CCT

1. JUICY WATERMELONS

Cubic watermelons are watermelons grown into the shape of a cube. This is generally intended for space efficiency in small refrigerators. The practice of growing cube watermelons is popular in Japan. The melons are grown in boxes and assume the shape of the container. Normal watermelons are round in nature.

QUESTION 1.1:

If the side of a cubical watermelon is equal to the diameter of a spherical watermelon and they are to be stacked in boxes, then which one would occupy more space than the other?

QUESTION 1.2:

If 90% of the watermelons are full of water, then how much water (juice) will you get from the cubic watermelon of side 15cm.

2. KUTTY’S TILING PROBLEM

Kutty is a floor tile maker. He used to make rectangular or square type of tiles. He prefers to make tiles of regular shapes, so that floorings can be made with these tiles alone without gaps by joining them corner to corner

Question 2.1:

How many rectangular tiles of size 30cmX15cm is required to for rectangular hall of size 3.6mX3m?

Question 2.2: How many tiles will be joined at one corner question 1,other than sides of the floor

Question 2.3: If he uses equi-triangular tiles how many of them join at one corner of tile? Other than sides of the floor

Question 2.4: What will be the size largest square tile that can be used for the floorings without cutting any tile for rectangular hall of size 24mX15m?

3. LARGEST EQUILATERAL TRIANGLE FROM A SQUARE

(a) Take a square piece paper name it ABCD.

(b) Fold It in such a way that it’s opposite edges lie on each other this folded line is the perpendicular bisector of the sides AB and DC .

(c) Take a point G on the folded line now fold the two adjacent vertices B and A of the square on the perpendicular bisector, such that the folded line pass through other two vertices C and D of the square.

(d) Now the triangle at the center is an equilateral triangle as it is formed by taking three sides of the square which are equal.

Questions

3.1 What type of triangle is formed? What is the measure of each angle of the triangle? 3.2 Find the area of the square whose side is 12cm? 3.3 Find the area of equilateral triangle of side 12cm? 3.4 What is the ratio area of a square of side a cm to area of equilateral triangle of side a? 3.5 If the side square is halved then it’s area will increase or decrease? 3.6 If the side of square is doubled then it’s area will be ?

4. MAXIMUM AREA

A rectangle is given. By paper folding activity, make an equilateral triangle with one side as breadth of the rectangle. Make another equilateral triangle with maximum area inside it. Questions

4.1 What is the height of maximum area equilateral triangle? 4.2 What is the side of that triangle? 4.3 Find the area of triangle? 4.4 What is the ratio of area of these two triangles?

1. GUESSING THE DAY

Module 5

CLASS X

MATHS CCT

ZEllER'S RULE: FIND THE DAY FOR GIVEN DATE QUICKLY

With this technique named after its founder Zeller, you can solve any 'Dates and Calendars' problems. ZEllER’S rule can be used to find the day on any particular date in the calendar in the history. All you have to know is the formula given below and how to use it.

ZEllER’S Rule Formula

F = K + [(13×M – 1)/5] + D + [D/4] + [C/4] -2C Where, 1) K = Date. So, for 27/06/2019, we take K = 27

In Zeller's rule, months start from March.

2) M= Month Number Remember that month start from March in this formula. So March = 1 April = 2 May = 3 June = 4 July = 5 August= 6 September= 7 October= 8 November= 9 December= 10 January= 11 February= 12

So, for 27/06/2019, M = 4

3) D = last two digits of the year

So, in our example of 27/06/2019, the value of D is 19 4) C = The first two digits of century

So, in our example of 27/06/2019, the value of C is 20.

Let us now calculate the day for 27/06/2019 with the above formula

F = K + [(13×M – 1)/5] + D + [D/4] + [C/4] -2C F = 27 + [(13×4 – 1)/5] + 19 + [19/4] + [20/4] -2× 20

Therefore, F = 27 + 10.2 + 19 + 4.75 + 5 – 40 [We have to consider only the integral value and ignore the value after decimal. So, the equation changes a bit as shown below. We have just removed value after decimal]

F = 27 + 10 + 19 + 4 + 5 – 40 i.e. F = 25

Now that you have a numerical value for the day, divide the number by 7. We need the remainder only. For example in this case, the remainder is 4.

Now, match the remainder with the chart below: 0 = Sunday 1 = Monday 2 = Tuesday 3 = Wednesday 4 = Thursday 5 = Friday 6 = Saturday

Here, 4 represents Thursday So, by Zeller s rule 27/06/2019 is on a Thursday.

Question1: By using the above Zeller' s formula, find the day for 15/08/1947.

Question2: By using the above Zeller' s formula, find the day for 26/01/1950.

Nnnnn. N

FLOOR

CARPET

2. RECTANGLE AND SQUARE

We have a floor and a carpet of the dimensions given below.

12 units. 18 units

12 units. 8 units

We want to cover the whole floor with the carpet.

Try to cover the floor with the carpet.

What do you find? Is it possible? Let us discuss the following.

Questions

1) Whose area is greater, floor or carpet?

2) How much area of floor can be covered with this carpet?

3) Can we cover the floor with carpet? How can we do it and find the minimum number of pieces in which carpet should be cut to cover the floor?

4) Find the perimeter of each piece of carpet?

5) If we want to join two pieces using a tape of width 1 unit, find the length of the tape required.

6) If price of tape is ₹5 per units. Find the money required to buy the tape.

3. SCOUT CAMP

Kendriya vidyalaya New Allahabad cantt is going to organise a scout camp of national level from 30 July 2019. The participants of 25 regions are coming. Every region scout team consists 15 students and two escorts.

Questions

1) How many people will be there on 1st August?

2) The vidyalaya has a huge playground. For making regionwise tent they given 40×40 square meter area in total.

What will be the maximum size of each tent if every tent shape will be square only?

3) How much rope will be required to make fences of each tent?

4) What is the area occupied per person?

5) During a trekking activity of 6km a student Ram will go to Sangam and return back up to 12 noon. He estimates that he can go to the Sangam at 1.5km/h on average, and return at half that speed. These speeds take into account breaks and rest times. Using Ram's estimated speeds, what is the latest time he can begin his walk so that he can return by 12 noon?

6) Ram used step count software on his mobile while trekking to count his steps on his walk to

Sangam. He found that he walked 13600 steps on return. Estimate average step length for his return walk. Give your answer in centimetres.

Creative and Critical Thinking- Class 9 Science Everything in the world around you, in nature, in your city, there are living and non living things. All these things together make up the mass of the Earth. Mass is the quantity of matter determined by its weight. All living and non living things contain matter. Isaac Newton , a famous Physicist discovered some basic principles related to energy , mass, and matter. One law that he put forward was ‘law of conservation of matter or mass’

In physics, mass is known to be in a closed system which means that there can be no exchange of matter with the surroundings .No form of matter can be transported or accepted inside the system. The law can be defined as the mass of a substance inside the system will remain constant, no matter what processes are acting inside the system. It is similar to Law of conservation of Energy, which means that total amount of energy in an isolated system remains constant over time.

There are many examples that explain this principle. During burning of coal there are products formed such as soot, ashes, heat and various types of gases. The mass of these products is directly proportional to the amount of coal that was burnt.

The law of conservation of matter states that matter can change its phase , such as from a solid to a liquid or liquid to a solid, but not the amount of matter or mass nor the energy that is available.

Choose the correct answer:

1. Mass is quantity of matter determined by which of the following: a) Size b) Weight c) material d) texture

2. Isaac Newton discovered some basic principles related to which of the following? a) Energy b) mass c) matter d) All

3. What does law of conservation of energy state? 4. State 2 examples where energy changes from one form to another. 5. What does law of conservation of energy verify?

Module 6

PHYSICS CLASS X CCT

HZ- 2 E-waste

The advancement in technology and changing lifestyle, status or perception of consumers has

driven the demand of electronic items. Consumers’ dependency on information and

communication technology has been increasing very rapidly. The new innovations in

information technology because of the rising demand for higher efficiency and productivity in

the businesses and work have become a matter of day to day life. Technologies which were new

yesterday have become obsolete for today.

The increase in demand for “White Goods segment” i.e. on consumer durables such as

television sets, microwave ovens, calculators, air-conditioners, servers, printers, scanners,

cellular phones, computers etc. is for obvious. Thus, there can be broad range of waste electric

and electronic goods which have outlived their use, ready for disposal.

These contain chemical materials considered hazardous for human well beings and natural

environment. The increasing rate of waste electronic products and additionally the illegal import

of junk electronics from abroad create a complex scenario for solid waste management in India.

81

Q1. What According to you is a E Waste ?

1. Waste generated by emails in the trash box

2. Waste collected in the school , home or at community level

3. Waste generated by electronic goods we use and throw

4. Waste caused due to all the electrical gadgets we use at home

5. Waste caused because of both electrical and electronic gadgets

A) 1 only B) 2 only C) 3, 4 and 5 D) None of the above

Q2: Can you identify some of the e-waste which are generated at school level and at your home level or at both levels and place it in the appropriate column? For one which does not cause any waste put a circle.

Q3 By looking at the picture shown above can you fill in the table given below

Q4 What according to you are the possible reasons of the increased usage of white goods segment, which has contributed to e-waste globally? Q5. Let’s imagine that the total waste generated in 2020 at global level increases to 50 metric tonne. If percentage remains same of the documented and undocumented waste then find out the following

Q6. Give your suggestions which you think is appropriate related to the above given scenario

Module 7

CLASS – 10

SOCIAL SCIENCE CCT

Writing at the beginning of the 20th century, Hobson uses the term “imperialism” to refer to a historically determinate event: the transformation of Nationalism, which had dominated the international arena for more than a century, into a general tendency of states to expand beyond their national boundaries. The impact of Nationalism on pre-existent territorial-political entities had in some cases been to increase their cohesion, in others to lead to their disintegration. But its general result was the formation of political units (States) of a relatively well-defined ethnic and cultural composition (Nations).Towards the end of the 19th century, however, these Nation- States had exhibited a tendency to “overflow their natural banks,” thereby giving rise to those expansionist phenomena which Hobson specified by the term “Imperialism.”

Answer the following questions:

1. What were the motives for Imperialism? 2. What were the effects of British Imperialism on India? 3. How does Nationalism contribute to building a powerful nation - state? 4. Discuss how world leaders used Nationalism to pursue their goal of national gain or

freedom. 5. How do Cultural Nationalism and Political Nationalism differ?

Module 8

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Module 9

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KENDRIYA VIDYALAYA DRDO, BANGALORE-93

AUTUMN -BREAK HW-2020

CLASS- X -SOCIAL SCIENCE

CLASS-X

1-. Map work of all the topics- as per CBSE list.

2- Solve – CBSE-Sample paper- Social Science-2020.

3- Solve all-CCT-MODULE.PICTURE-BASED,SOURCES BASED QUESTIONS Covering syllabus .

(All in separate- activity notebook).

CLASS X (A&B) –SANSKRIT (Holiday Home Work)

Whichever Worksheet is given before H/Y Exam

All writing part should be completed.

1

Class X Mathematics –Standard (041)

Sample Question Paper 2019-20

Max. Marks: 80 Duration : 3 hrs

General Instructions:

(i) All the questions are compulsory. (ii) The question paper consists of 40 questions divided into 4 sections A, B, C, and D. (iii) Section A comprises of 20 questions of 1 mark each. Section B comprises of 6 questions of

2 marks each. Section C comprises of 8 questions of 3 marks each. Section D comprises of 6 questions of 4 marks each.

(iv) There is no overall choice. However, an internal choice has been provided in two questions of 1 mark each, two questions of 2 marks each, three questions of 3 marks each, and three questions of 4 marks each. You have to attempt only one of the alternatives in all such questions.

(v) Use of calculators is not permitted.

SECTION A Q 1- Q 10 are multiple choice questions. Select the most appropriate answer from the given options.

1 The decimal representation of ×

will a) terminate after 1 decimal place b) terminate after 2 decimal places c) terminate after 3 decimal places d) not terminate

1

2

2

Consider the following frequency distribution of the heights of 60 students of a class

The upper limit of the median class in the given data is

a) 165 b) 155 c) 160 d) 170

Height (in cm)

150-155 155-160 160-165 165-170 170-175 175-180

No of students

15 13 10 8 9 5

1

3 The LCM of smallest two digit composite number and smallest composite number is a) 12 b) 4 c) 20 d) 44

1

4 For which value(s) of , will the lines represented by the following pair of linear equations be parallel

3 − − 5 = 0 6 − 2 − = 0

a) all real values except 10 b) 10 c) 5/2 d) 1/2

1

3

5 If triangle ABC is right angled at C, then the value of sec (A+B) is a) 0 b) 1 c)

√

d) not defined

1

6

If + = √2 , ( ≠ 90°) then the value of is a) √2 − 1 b) √2 + 1 c) √2 d) −√2

1

7

Given that = √ and = 0, then the value of − is

a) 0° b) 90° c) 60° d) 30°

1

8

The point which divides the line segment joining the points (8, – 9) and (2, 3) in ratio 1 : 2 internally lies in the

a) I quadrant b) II quadrant c) III quadrant d) IV quadrant

1

9

The distance of the point P (−3,−4) from the x-axis (in units) is a) 3 b) −3 c) 4 d) 5

1

4

10

If A( , 5)is the mid-point of the line segment joining the points Q (– 6, 7) and R (– 2, 3), then the value of is

a) −12 b) −4 c) 12 d) −6

1

(Q 11- Q 15) Fill in the blanks 11 The total surface area of the given solid figure is _______________

1

12 If one root of the equation ( − 1) − 10 + 3 = 0 is the reciprocal of the other, then the

value of is___________

OR

The graph of = ( ), where ( ) is a polynomial in variable x, is as follows:

Y

X

The number of zeroes of ( ) is _______________

1

13 The perimeters of two similar triangles ∆ABC and ∆PQR are 35cm and 45cm

respectively, then the ratio of the areas of the two triangles is______________ 1

5

14 Fill the two blanks in the sequence 2, ____ , 26, ____ so that the sequence forms an A.P

1

15 A number is chosen at random from the numbers -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5. Then

the probability that square of this number is less than or equal to 1 is _____________ 1

(Q 16- Q 20) Answer the following 16 Write one rational and one irrational number lying between 0.25 and 0.32 1

17 In the figure, if ACB = CDA, AC = 6 cm and AD = 3 cm, then find the length of AB C A B D

1

18 If the angle between two tangents drawn from an external point ‘P’ to a circle of radius ‘r’

and centre O is 600, then find the length of OP.

OR

If the radii of two concentric circles are 4 cm and 5 cm, then find the length of each chord of one circle which is tangent to the other circle.

1

19 If the first three terms of an A.P are b, c and 2b, then find the ratio of b and c 1

20 Find the value(s) of for which the quadratic equation + 2√2 + 18 = 0 has equal roots

1

Section – B

21 Find the number of natural numbers between 102 and 998 which are divisible by 2 and 5 both.

2

22 Prove that the rectangle circumscribing a circle is a square. 2

6

23 In the given figure, DEFG is a square and BAC = 900. Show that FG2= BG x FC

OR

In an equilateral triangle, prove that three times the square of one side is equal to four times the square of one of its altitudes.

2

24 ‘Skysails’ is that genre of engineering science that uses extensive utilization of wind

energy to move a vessel in the sea water. The ‘Skysails’ technology allows the towing kite to gain a height of anything between 100 metres – 300 metres. The sailing kite is made in such a way that it can be raised to its proper elevation and then brought back with the help of a ‘telescopic mast’ that enables the kite to be raised properly and effectively.

Based on the following figure related to sky sailing, answer the questions:

(i) In the given figure, if sin = cos (3 − 30 ), where and 3 − 30 are acute

angles, then find the value of . (ii) What should be the length of the rope of the kite sail in order to pull the ship at

the angle (calculated above) and be at a vertical height of 200 m?

2

7

25 Jayanti throws a pair of dice and records the product of the numbers appearing on the dice. Pihu throws 1 dice and records the squares the number that appears on it. Who has the better chance of getting the number 36? Justify?

OR

An integer is chosen between 70 and 100, Find the probability that it is (a) a prime number (b) divisible by 7

2

26 Isha is 10 years old girl. On the result day, Isha and her father Suresh were very happy

as she got first position in the class. While coming back to their home, Isha asked for a treat from her father as a reward for her success. They went to a juice shop and asked for two glasses of juice.

Aisha, a juice seller, was serving juice to her customers in two types of glasses. Both the glasses had inner radius 3cm. The height of both the glasses was 10cm.

First type: A Glass with hemispherical raised bottom.

Second type: A glass with conical raised bottom of height 1.5 cm.

Isha insisted to have the juice in first type of glass and her father decided to have the juice in second type of glass. Out of the two, Isha or her father Suresh, who got more quantity of juice to drink and by how much?

2

Section C

27 Given that √5 is irrational, prove that 2√5− 3is an irrational number.

OR

If HCF of 144 and 180 is expressed in the form 13m-16. Find the value of m.

3

8

28 If the sum of first m terms of an AP is the same as the sum of its first n terms, show

that the sum of its first (m+n) terms is zero.

3

29 In the figure, ABCDE is a pentagon with BE||CD and BC||DE. BC is perpendicular to

CD. AB= 5cm, AE=5cm, BE= 7cm, BC= x-y and CD= x+y. If the perimeter of ABCDE is 27cm. find the value of x and y, given x, y ≠ 0.

A

B E

C D

OR

Solve the following system of equations:

21+

47= 110

+ = 162, , ≠ 0

3

30 Obtain all the zeros of the polynomial x4+4x3-2x2-20x-15, if two of its zeroes are √5 and

−√5. 3

31 Two friends Seema and Aditya work in the same office at Delhi. In the Christmas

vacations, both decided to go to their hometowns represented by Town A and Town B respectively in the figure given below. Town A and Town B are connected by trains from the same station C (in the given figure)in Delhi.Based on the given situation, answer the following questions:

3

9

(i) Who will travel more distance, Seema or Aditya, to reach to their hometown? (ii) Seema and Aditya planned to meet at a location D situated at a point D

represented by the mid-point of the line joining the points represented by Town A and Town B. Find the coordinates of the point represented by the point D

(iii) Find the area of the triangle formed by joining the points represented by A, B and C.

32 If sin θ + cos θ = √3, then prove that tan θ + cot θ =1

OR

Evaluate:

( ° ) ( ° )( ° )× ( ° )

+ ( 30° + 90°) × ( 60° − 0°)

3

33 Sides of a right triangular field are 25m, 24m and 7m. At the three corners of the field, a

cow, a buffalo and a horse are tied separately with ropes of 3.5 m each to graze in the field. Find the area of the field that cannot be grazed by these animals.

3

10

34 A TV reporter was given a task to prepare a report on the rainfall of the city Dispur of India in a particular year. After collecting the data, he analyzed the data and prepared a report on the rainfall of the city. Using this report, he drew the following graph for a particular time period of 66 days

Based on the above graph, answer the following questions:

(i) Identify less than type ogive and more than type ogive from the given graph. (ii) Find the median rainfall of Dispur (iii) Obtain the Mode of the data if mean rainfall is 23.4cm

3

Section - D

35 Draw a triangle ABC with side BC=6.5cm, ∠B=30°, ∠A =105°. Then construct another triangle whose sides are times the corresponding sides of the triangle ABC.

OR

Construct a pair of tangents to a circle of radius 3 cm which are inclined to each other at an angle of 60°

4

0

10

20

30

40

50

60

70

0 10 20 30 40 50 60 70

Cum

ulat

ive

Freq

uenc

y

Rainfall in cm

curve 1

curve 2

11

36 Prove that if a line is drawn parallel to one side of a triangle to intersect the other two

sides in distinct points, then the other two sides are divided in the same ratio. 4

37 A train covers a distance of 360 km at a uniform speed. Had the speed been 5km/hour

more, it would have taken 48 minutes less for the journey. Find the original speed of the train.

OR Solve the following equation:

- = 3, ≠ 0, 2

4

38 A petrol tank is in the form of a frustum of a cone of height 20 m with diameters of its

lower and upper ends as 20 m and 50 m respectively. Find the cost of petrol which can fill the tank completely at the rate of Rs. 70 per litre. Also find the surface area of the tank.

OR

Water is flowing at the rate of 15km/hour through a pipe of diameter 14cm into a cuboidal pond which is 50m long and 44m wide. In what time will the level of water in the pond rise by 21cm?

4

39 The angle of elevation of an airplane from a point on the ground is 600. After a flight of 30 seconds, the angle of elevation becomes 300. If the airplane is flying at a constant height of 3000√3 m, find the speed of the airplane.

4

40 Daily wages of 110 workers, obtained in a survey, are tabulated below:

Compute the mean daily wages and modal daily wages of these workers.

Daily Wages (in Rs.)

100-120 120-140 140-160 160-180 180-200 200-220 220-240

Number of

Workers

10 15 20 22 18 12 13

4

1

Class – X

Mathematics-Basic (241)

Sample Question Paper 2019-20

Max. Marks: 80 Duration: 3 hrs.

General Instructions: a) All questions are compulsory

b) The question paper consists of 40 questions divided into four sections A, B, C & D.

c) Section A comprises of 20 questions of 1 mark each. Section B comprises of 6

questions of 2 marks each. Section C comprises of 8 questions of 3 marks each.

Section D comprises 6 questions of 4 marks each.

d) There is no overall choice. However internal choices have been provided in two

questions of 1 mark each, two questions of 2 marks each, three questions of 3 marks

each and three questions of 4 marks each. You have to attempt only one of the

alternatives in all such questions.

e) Use of calculators is not permitted.

SECTION – A

Q 1- 10 are multiple choice questions. Select the most appropriate answer from the given options. 1. HCF of 168 and 126 is

(a) 21 (b) 42 (c) 14 (d) 18

1

2. Empirical relationship between the three measures of central tendency is 1

2

(a) 2 Mean = 3 Median – Mode (b) 2 Mode = 3

Median – Mean (c) Mode = 2 Mean – 3 Median (d) 3 Median = 2 Mode + Mean

3. In the given figure, if TP and TQ are tangents to a circle with centre O, so

that ∠POQ = 110°, then ∠PTQ is

(a) 110° (b) 90°

(c) 80° (d) 70°

1

4. 325 can be expressed as a product of its primes as

(a) 52×7 (b) 52×13 (c) 5×132 (d) 2×32×52

1

5. One card is drawn from a well shuffled deck of 52 cards. The probability

that it is black queen is

(a) (b) (c) (d)

1

6. The sum of the zeroes of the polynomial 2x2-8x +6 is

(a) - 3 (b) 3 (c) - 4

(d) 4

1

7. Which of the following is the decimal expansion of an irrational number

(a) 4.561 (b) 0.12 (c) 5.010010001… (d) 6.03

1

3

8. The following figure shows the graph of y = p(x), where p(x) is a polynomial in variable x. The number of zeroes of the polynomial p(x) is

(a) 1 (b) 2 (c)3 (d) 4

1

9. The distance of the point P (3, - 4) from the origin is

(a) 7 units (b) 5 units (c)4 units

(d) 3 units

1

10. The mid point of the line segment joining the points (- 5, 7) and (- 1, 3) is

(a) (-3, 7) (b) (-3, 5) (c) (-1, 5)

(d) (5, -3)

1

(11 – 15) Fill in the blanks: 11. The point which divides the line segment joining the points A (0, 5) and

B (5, 0) internally in the ratio 2:3 is _____________

1

12. The pair of lines represented by the equations 2x+y+3 = 0 and 4x+ky+6 =

0 will be parallel if value of k is ______.

OR

If the quadratic equation x2 – 2x + k = 0 has equal roots, then value of k

1

4

is ______. 13. The value of sin 60 cos 30 + sin 30 cos 60 is______.

1

14. Value of cos 0°. Cos 30° .cos 45° . cos 60° . cos 90° is ___________.

1

15. The sides of two similar triangles are in the ratio 2:3, then the areas of

these triangles are in the ratio ______________

(16 – 20) Answer the following : 16. △PQR is right angled isosceles triangle, right angled at R. Find value of

sin P.

OR

If 15 cot A = 8, then find value of cosec A.

1

17. If area of quadrant of a circle is 38.5 cm2 then find its diameter

(use π = )

1

18. A dice is thrown once. Find the probability of getting a prime number.

1

19. In the given fig. If DE ‖ BC Find EC.

1

5

20. Find the common difference of the A.P whose first term is 12 and fifth

term is 0.

1

SECTION – B

21. If two coins are tossed simultaneously. Find the probability of getting 2 heads.

2

22. A lot of 25 bulbs contain 5 defective ones. One bulb is drawn at random

from the lot. What is the probability that the bulb is good.

OR Two dice are thrown simultaneously at random. Find the probability of getting a sum of eight.

2

23. Prove that the tangents drawn at the ends of a diameter of a circle are

parallel.

2

24. Show that tan 48 tan 23 tan 42 tan 67 = 1.

OR

Evaluate cos 48 cos 42 − sin 48 sin 42

2

25. Find the area of circle whose circumference is 22cm.

2

26 Read the following passage and answer the questions that follows:

A teacher told 10 students to write a polynomial on the black board. Students wrote

1. x 2 + 2 6. x – 3 2. 2x + 3 7. x4 + x2 + 1 3. x3+ x2 + 1 8. x2 + 2x + 1 4. x3+ 2x2 + 1 9. 2x3 – x2

2

6

5. x2 – 2x + 1 10. x4 – 1

(i) How many students wrote cubic polynomial (ii) Divide the polynomial (x2 + 2x + 1) by ( x + 1).

SECTION C

27. Find the zeroes of the quadratic polynomial x − 3x − 10 and verify the relationship between the zeroes and coefficient.

3

28. Draw a circle of radius 4 cm.From the point 7 cm away from its centre,

construct the pair of tangents to the circle. OR

Draw a line segment of length 8 cm and divide it in the ratio 2:3

3

29. Following figure depicts a park where two opposite sides are parallel and

left and right ends are semi-circular in shape. It has a 7m wide track for walking

Two friends Seema and Meena went to the park. Meena said that area of the track is 4066m2. Is she right? Explain.

3

30. Prove that =

OR

Prove that:

=

3

7

31. Prove that 5 - √3 is irrational, given that √3 is irrational.

OR

An army contingent of 616 members is to march behind an army band of 32 members in a parade. The two groups are to march in the same number of columns. What is the maximum number of columns in which they can march ?

3

32. Prove that the lengths of tangents drawn from an external point to a circle

are equal.

3

33. Read the following passage and answer the questions that follows:

In a class room, four students Sita, Gita, Rita and Anita are sitting at A(3,4), B(6,7), C(9,4), D(6,1) respectively. Then a new student Anjali joins the class

3

(i) Teacher tells Anjali to sit in the middle of the four students. Find the coordinates of the position where she can sit.

1

(ii) Calculate the distance between Sita and Anita.

1

(iii) Which two students are equidistant from Gita.

1

8

34. Solve 2x + 3y = 11 and x − 2y = −12 algebraically and hence find the value

of ‘m’ for which y = mx + 3.

3

SECTION D

35. Find two consecutive positive integers sum of whose squares is 365.

4

36. If the sum of first 14 terms of an A.P. is 1050 and its first term is 10,

find the 20 th term.

OR

The first term of an A.P. is 5, the last term is 45 and sum is 400. Find the number of terms and the common difference.

4

37. As observed from the top of a 75m high light house above the sea level,

the angles of depression of two ships are 30O and 45O respectively If one ship is exactly behind the other on the same side of the light house and in the same straight line, find the distance between the two ships. (use √3 = 1.732)

4

38. If a line is drawn parallel to one side of a triangle to intersect the other

two sides in distinct points, then prove that the other two sides are divided in the same ratio.

OR

State and prove the Pythagoras theorem.

4

39. A copper rod of diameter 1 cm and length 8 cm is drawn in to a wire of length 18 m of uniform thickness. Find the thickness of wire.

Or

4

9

A metallic sphere of radius 4.2 cm is melted and recast into the shape of a cylinder of radius 6 cm. Find the height of the cylinder.

40.

The following distribution gives the daily income of 50 workers of a factory

Daily income

400-420

420-440 440-460 460-480 480-500

Number of workers

12 14 8 6 10

Convert this distribution to less than type of cumulative frequency distribution and draw its ogive.

4

1

KVDRDO B’LURU-93

AUTUMN BREAK HOMEWORK CLASS X

READING 1: 10x1= 10 marks

Red Cross: How Hope Evolved

On June 24, 1859, Emperors Napoleon III and Franz Joseph I engaged in the Battle of Solferino, commanding a

combined total of about 270,000 troops onto the field for a single day of battle. Nearly 40,000 were either dead, injured,

or missing, many of whom were simply left to die on the battlefield. Later, spectators crowded the fields, looking for

loved ones, searching for items they could sell, or simply taking in the horrors of the battle .A Swiss businessman and

social activist Jean Henri Dunant, who was traveling in Solferino witnessed all this. Jean Henri Dunant witnessed the

atrocities of war as well as the countries not prepared or equipped to ease the suffering of those who had been injured

in the Battle of Solferino. Dunant organized a group of volunteers to help bring water and food to the injured, to assist

with medical treatment, or write letters to the families of those who were dying and he urged the public to create an

organization which would assist the wounded, regardless of which side they fought for during times of war. After that

moment, he wrote the book, A Memory of Solferino, which urged the public to create an organization which would

assist the wounded, regardless of which side they fought for during times of war. His writing inspired countless others

to rally behind him in the creation of the International Federation of the Red Cross. The modern-day Red Cross began

by devoting itself largely to disaster relief and epidemic treatment. This effort continues to this day. One of the easiest

ways you can help the Red Cross is to make sure you are able to donate blood and make an appointment at the Red

Cross website. But, donating blood isn't the only way you can help out—the Red Cross also encourages donating your

time if you can. This is what the Red Cross wants everyone to know.

On the basis of your reading of the passage given above, answer the following questions:-

a. How many soldiers fought in the battle of Solferino on June 24? I. 270,000

II. 40,000

III. 230,000

IV. 23,000

b. What is the correct order of the information given below? I. Dunant organised a camp of volunteers.

II. Emperor Napoleon III and Franz Joseph I fought a battle.

III. The book ‘A Memory of Solferino was written.

IV. Dunant travelled in Solferino.

(i) IV, III, II, I

(ii) I, II, III, IV

(iii) II, I, IV, III

(iv) II, IV, I, III

c. The writer of 'A Memory of Solferino’ was: I. Emperor Napoleon III

II. Franz Joseph I

III. Jean Henri Dunant

IV. International Red Cross

d. The modern day Red Cross does not deal with: I. Blood donation

II. Disaster Relief

III. Epidemic Treatment

IV. Writing a book

e. The most appropriate sub-heading to para 2 of the passage is:

I. How International Federation of Red Cross Evolved!

II. Functions of Red Cross

III. iii. The Contributions of Jean Henri Dunant

IV. iv. The Battle of Solferino

f. Which two describes ‘Jean Henri Dunant’ correctly:

I. an social activist

2

II. a soldier

III. a traveller

IV. a Swiss businessman

(i) I & III

(ii) II & IV

(iii) I & IV

(iv) II & III

gThe aid provided by Dunant’s volunteers during the battle of Solferino was:

I. to help bring water and food to the injured

II. to assist with medical treatment

III. to write a book

IV. to give relief in epidemic

(i) I and III

(ii) III and IV

(iii) I and II

(iv) II and III

h. Which one is not instrumental in helping out Red Cross?

I. Making an appointment at its website

II. Donating blood

III. Donating time

IV. Reading about its mission

i. Which one describes the meaning of rallying behind in creating the organisation ‘RED CROSS”

I. Making a procession

II. Being supportive

III. Moving along

IV. Increasing in number

j. Which of the following is not similar to the meaning of ‘Atrocity’ here:

I. inhumanity

II. Lubricity

III. barbarity

IV. Cruelty

READING 2: 10 marks

Making time for science

Chronobiology might sound a little futuristic – like something from a science fiction novel, perhaps – but it’s actually a

field of study that concerns one of the oldest processes life on this planet has ever known: short-term rhythms of time

and their effect on flora and fauna.

This can take many forms. Marine life, for example, is influenced by tidal patterns. Animals tend to be active or inactive

depending on the position of the sun or moon. Numerous creatures, humans included, are largely diurnal – that is, they

like to come out during the hours of sunlight. Nocturnal animals, such as bats and possums, prefer to forage by night. A

third group are known as crepuscular: they thrive in the low-light of dawn and dusk and remain inactive at other hours.

When it comes to humans, Chrono biologists are interested in what is known as the circadian rhythm. This is the

complete cycle our bodies are naturally geared to undergo within the passage of a twenty-four hour day. Aside from

sleeping at night and waking during the day, each cycle involves many other factors such as changes in blood pressure

and body temperature. Not everyone has an identical circadian rhythm. ‘Night people’, for example, often describe how

they find it very hard to operate during the morning, but become alert and focused by evening. This is a benign variation

within circadian rhythms known as a Chrono type.

Scientists have limited abilities to create durable modifications of Chrono biological demands. Recent therapeutic

developments for humans such as artificial light machines and melatonin administration can reset our circadian rhythms,

for example, but our bodies can tell the difference and health suffers when we breach these natural rhythms for extended

3

periods of time. Plants appear no more malleable in this respect; studies demonstrate that vegetables grown in season

and ripened on the tree are far higher in essential nutrients than those grown in greenhouses and ripened by laser.

Knowledge of Chrono biological patterns can have many pragmatic implications for our day-to-day lives. While

contemporary living can sometimes appear to subjugate biology – after all, who needs circadian rhythms when we have

caffeine pills, energy drinks, and shift work and cities that never sleep? – keeping in synch with our body clock is

important.

The average urban resident, for example, rouses at the eye-blearing time of 6.04 a.m., which researchers believe to be

far too early. One study found that even rising at 7.00 a.m. has deleterious effects on health unless exercise is performed

for 30 minutes afterward. The optimum moment has been whittled down to 7.22 a.m.; muscle aches, headaches and

moodiness were reported to be lowest by participants in the study who awoke then.

Once you’re up and ready to go, what then? If you’re trying to shed some extra pounds, dieticians are adamant: never

skip breakfast. This disorients your circadian rhythm and puts your body in starvation mode. The recommended course

of action is to follow an intense workout with a carbohydrate-rich breakfast; the other way round and weight loss results

are not as pronounced.

Morning is also great for breaking out the vitamins. Supplement absorption by the body is not temporal-dependent, but

naturopath Pam Stone notes that the extra boost at breakfast helps us get energised for the day ahead. For improved

absorption, Stone suggests pairing supplements with a food in which they are soluble and steering clear of caffeinated

beverages. Finally, Stone warns to take care with storage; high potency is best for absorption, and warmth and humidity

are known to deplete the potency of a supplement.

After-dinner espressos are becoming more of a tradition – we have the Italians to thank for that – but to prepare for a

good night’s sleep we are better off putting the brakes on caffeine consumption as early as 3 p.m. With a seven hour

half-life, a cup of coffee containing 90 mg of caffeine taken at this hour could still leave 45 mg of caffeine in your

nervous system at ten o’clock that evening. It is essential that, by the time you are ready to sleep, your body is rid of all

traces.

Evenings are important for winding down before sleep; however, dietician Geraldine Georgiou warns that an after-five

carbohydrate-fast is more cultural myth than Chrono biological demand. This will deprive your body of vital energy

needs. Overloading your gut could lead to indigestion, though. Our digestive tracts do not shut down for the night

entirely, but their work slows to a crawl as our bodies prepare for sleep. Consuming a modest snack should be entirely

sufficient.

1) Chronobiology is the study

a. of how living things have evolved over time.

b. of writing a science fiction novel

c. of the oldest processes life on this planet

d. of time and its effect on flora and fauna.

2) Circadian rhythms identify

a. how we do different things on different days.

b. effects on flora and fauna.

c. tidal patterns.

d. the position of the sun or moon

3) ‘night person’ refers to

a. a person with healthy circadian rhythm.

b. A person who comes out during the hours of sunlight

c. A person who sleeps from dusk to dawn

d. A person who feels it difficult to work during morning hours

4) Crepuscular means

a. active all through the day time

b. active during the night time

c. active during sunrise & sunset times

d. None of the above

5) What did researchers identify as the ideal time to wake up in the morning?

a. 6.04

4

b. 7.00

c. 7.22

d. 7.30

6) In order to lose weight, we should

a. avoid eating breakfast

b. eat a low carbohydrate breakfast

c. exercise before breakfast

d. exercise after breakfast

7) Which is NOT mentioned as a way to improve supplement absorption?

a. avoiding drinks containing caffeine while taking supplements

b. taking supplements at breakfast

c. taking supplements with foods that can dissolve them

d. storing supplements in a cool, dry environment

8) The best time to stop drinking coffee is

a. mid-afternoon

b. 10 p.m.

c. only when feeling anxious

d. After dinner

9) In the evening, we should

a. stay away from carbohydrates

b. stop exercising

c. eat as much as possible

d. eat a light meal

10) Which of the following phrases best describes the main aim of Reading Passage 1?

a. to suggest healthier ways of eating, sleeping and exercising

b. to describe how modern life has made chronobiology largely irrelevant

c. to introduce chronobiology and describe some practical applications

d. to plan a daily schedule that can alter our natural Chrono biological rhythms

LITERATURE (10 marks)

3. Read the extracts given below and attempt by answering the questions that follow. (5x1)

Tears blurred her eyes and she gazed for a long time at the picture. Then hastily she rubbed her eyes and

studied it intently. The colours in the dress were so vivid that she had scarcely noticed the face and head of

the drawing. But it looked like her, Maddie! It really looked like her own mouth!

i. ‘She’ here refers to

a. Peggy

b. Maddie

c. Wanda

d. None

ii. When she looked at the drawing,

a. She wept

b. She laughed

c. She became mute

d. She cried

iii. Maddie found that the face and head of the drawing

a. Just like her teacher

b. Just like Wanda

c. Just like her

d. Just like Peggy

5

iv. Tears blurred her eyes because she felt

a. Lonely

b. Guilty

c. Abandoned

d. Cheated

v. The word ‘intently’ means

a. Intentionally

b. Intensely

c. Intended

d. attentively

Q4. Read the extracts given below and attempt, by answering the questions that follow. (5x1)

I saw it go

Merrily bouncing, down the street, and then

Merrily over — there it is in the water!

No use to say ‘O there are other balls’:

An ultimate shaking grief fixes the boy

As he stands rigid, trembling, staring down

All his young days into the harbour where

His ball went

i. The poet uses the ball as a symbol of the boy’s

a) sense of adventure.

b) carefree childhood days.

c) ability to bounce back.

d) extended family.

ii. The poet feels that there is no point consoling the boy as

a) it would give him false hope.

b) he might demand for a new ball.

c) it might distress him further.

d) whatever he has lost is irretrievable.

iii. The word ‘harbour’ DOES NOT have a meaning similar to

a) port.

b) pier.

c) dock.

d) cargo.

iv. ‘Merrily over — there it is in the water!’ The dash here is meant to convey

a) some familiar experience.

b) a feeling of excitement.

c) a sense of unexpected interruption.

d) some thoughtful moments.

v. The word that DOES NOT indicate a physical manifestation of sorrow in the boy, is

a) worthless.

b) shaking.

c) trembling.

d) rigid.

6

GRAMMAR

Q 5. Choose the correct options to fill in the blanks to complete Venu’s narration. 4x1=4

I saw Supandi standing in the field. When I (a)…………………………………., he

(b)………………………………… he was trying to win a Nobel prize. I was confused and enquired

(c)………………………………………….. He stumped me by saying that he (d)

………………………………………… won Nobel prizes had all been outstanding in their fields!

(a)

i. exclaimed what was he doing standing all alone there

ii. told him what was he doing standing all alone here

iii. asked him what he was doing standing all alone there

iv. says to him about what doing standing all alone there

(b)

i. ordered that

ii. refused that

iii. questioned that

iv. replied that

(c)

i. how standing in the rice field would help him

ii. how standing in the rice field help him

iii. how standing in the rice field will help him

iv. standing in the rice field how would help him

(d)

i. has heard that people who has

ii. was hearing that people who were

iii. had heard that people who had

iv. did hear that people who had

7

6. Fill in the blanks by choosing the correct options for the sentences given below. 4x1= 4

(i) You …………………… consult the Thesaurus if you need groups of synonyms for those words.

a. had to

b. need to

c. used to

d. might

(ii) Everybody …………… keen to participate in the upcoming nukkad natak.

a. are

b. has

c. is

d. were

(iii) The good news is that…………… volunteers dropped out this month than the last two.

a. fewer

b. less

c. few

d. a little

(iv)It was …………… historic day for the organisation when ……………. honour was bestowed upon its employees.

a. a; an

b. an; the

c. the; a

d. an; a

Q7. Choose the correct options to fill in the blanks to complete the note about the Wangala Festival of

Meghalaya. 3x1= 3

The Wangala (i)…………………………festival for the Garo in Meghalaya, Assam and Nagaland. It is a

postharvest festival (ii)……………… the end of the agricultural year. It is popularly known as ‘The Hundred

Drums’ festival. During the signature dance, the leading warrior (iii)……………………… with synchronised

dance steps and specific hand-head movements.

(i)……

a. is important

b. are an important

c. was the important

d. is an important

(ii)…..

a. being celebrated for marking

b. celebrated to mark

c. celebrated to marking

d. being celebrated for mark

(iii) ……

a. leads the youngsters

b. is lead the youngsters

c. was leading the youngsters

d. had leads the youngsters

WRITING

8. Attempt ANY ONE of the following in 100-120 words. (5 marks)

(A) You are Tabassum/Tarun, a resident of Satya Nagar Colony, Bhubaneshwar, Orissa. You have noticed that some

residents of your colony are repeatedly flouting quarantine rules laid out during the outbreak of the COVID–19

pandemic.

Write a letter to the SHO of the local Police Station, drawing attention towards the same. Explain how such acts

impact the health of the community and request immediate intervention and strict action.

OR

8

(B) You are Vaijanthi/Vijay from Prakasham Nagar, Secunderabad, Andhra Pradesh. Write a letter to Book Haven

Store, requesting home delivery of the books, stationery and art materials you had ordered telephonically. Share the

reason for being unable to pick up the goods in person. Confirm your address details and a convenient time slot.

Q 9. The newspaper clipping ‘HUNGER INDEX’ below shows that India ranks 94 among 107. Based on the

information, write a paragraph analysing the given data in about 100-120 words. Give a proper heading to the

paragraph.

OR

Read the following excerpt from an article that appeared in the magazine section of a local daily:

The ban on single-use plastic is impractical. The purpose of articles like bags and packaging is ultimately to

make human life easier. Plastic articles do this well, so they shouldn’t be banned. Write a paragraph to

analyse the given argument

You could think about what alternative explanations might weaken the given conclusion and include

rationale / evidence that would strengthen / counter the given argument.

LANGUAGE & LITERATURE

Q 9. (A) Answer any two of the following questions in 30 - 40 words 2 X2=4

a. Nelson Mandela speaks of ‘Twin Obligations’. Elucidate.

b. How is bread an important part of life in Goa?

c. How will ‘ice’ be as ‘great’ and ‘suffice’ for causing the end of this existing world?

(B). Answer any two the following questions in about 30 - 40 words 2x2= 4

a. Why did Hari Singh think that Anil’s job was queer?

b. Bholi was a neglected child. Explain

c. How did a book become a turning point in Richard Ebright’s life?

9

Q 10 (A) Answer any two of the following questions in about 40-50 words: 3x2= 6

a. How would you compare and contrast Maggie and Peggy?

b. What does the tiger do at night? What does he feel when he stares at the brilliant stars in the sky?

c. Amanda is an escapist. Explain.

(B) Answer any two of the following questions in about 40-50 words: 3x2= 6

a. Justify the title ‘The Triumph of Surgery’.

b. Describe the narraor’s encounter with Lutkin’s mother.

c. Why did a brilliant scientist like Griffin, succeeded degenerated into a lawless and homeless wanderer?

Q 11. Answer any one the following question in about 80-100 words 5 marks

Lencho had faith in God but lacked faith in humanity. Elaborate with reference to ‘A Letter to God’.

OR

Valli shows extraordinary courage in taking a bus journey all alone. Explain how ability and courage are essential to

fulfill one’s dream.

Q 12. Answer any one the following question in about 80-100 words 5 marks

Ostentation and vanity often land people in trouble. Matilda is an apt example of this. Justify.

OR

Give a character sketch of Bill, the hack driver.

***********************************************************************************************

HOLIDAY HOME WORK – AUTUMN BREAK 2020

KV DRDO BANGALORE

CLASS 10

SUB-SCIENCE

1. When a cell reproduces, what happens to its DNA?

2. Na, Mg and Al are the elements of the 3rd period of the Modern Periodic Table having group

number 1, 2 and 13 respectively. Which one of these elements has the (a) highest valency,

(b) largest atomic radius, and (c) maximum chemical reactivity? Justify your answer stating

the reason for each.

3. (a) Write the functions of each of the following parts in a human female reproductive

system:

(i) Ovary

(ii) Uterus

(iii) Fallopian tube

(b) Write the structure and functions of placenta in a human female.

4. A student focuses the image of a candle flame, placed at about 2 m from a convex lens of

focal length 10 cm, on a screen. After that he moves gradually the flame towards the lens

and each time focuses its image on the screen.

(A) In which direction does he move the lens to focus the flame on the screen?

(B) What happens to the size of the image of the flame formed on the screen?

(C) What difference is seen in the intensity (brightness) of the image of the flame on the

screen?

(D) What is seen on the screen when the flame is very close (at about 5 cm) to the lens?

5. List two different functions performed by pancreas in our body.

How it can be proved that the basic structure of the Modem Periodic Table is based on the

electronic configuration of atoms of different elements?

6. The electronic configuration of an element is 2, 8, 4. State its :

(a) group and period in the Modern Periodic Table.

(b) name and write its one physical property

7 The growing size of the human population is a cause of concern for all people. The rate of birth in a

given population will determine its size. Reproduction is the process by which organisms increase

their population. The process of sexual maturation for reproduction is gradual and takes place while

general body is still going on. Some degree of sexual maturation does not necessarily mean that

mind or body is ready for sexual acts or for having and bringing up children. Various contraceptive

devices are being used by human beings to control the size of population.

(a) List two common signs of sexual maturation in boys and girls.

(b) What is the result of reckless female foeticide?

(c) Which contraceptive method changes the hormonal balance of the body?

(d) Write two factors that determine the size of a population.

8 (a) A student suffering from myopia is not able to see distinctly the objects placed beyond 5 m. List

two possible reasons due to which this defect of vision may have arisen. With the help of ray

diagrams, explain

(i) why the student is unable to see distinctly the objects placed beyond 5 m from his eyes.

(ii) the type of the corrective lens used to restore proper vision and how this defect is corrected by

the use of this lens.

(b) If, in this case, the numerical value of the focal length of the corrective lens is 5 m, find the power

of the lens as per the new Cartesian sign convention.

9 For question numbers i, and ii , two statements are given- one labelled Assertion (A) and the

other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c)

and (d) as given below:

a) Both A and R are true, and R is correct explanation of the assertion.

b) Both A and R are true, but R is not the correct explanation of the assertion.

c) A is true, but R is false.

d) A is false, but R is true.

i. (A ) . Assertion: After white washing the walls, a shiny white finish on walls is obtained after two to

three days.

(R) . Reason: Calcium Oxide reacts with Carbon dioxide to form Calcium Hydrogen Carbonate which

gives shiny white finish.

ii. (A) . Assertion: A geneticist crossed a pea plant having violet flowers with a pea plant with white

flowers, he got all violet flowers in first generation.

(R ) Reason: White colour gene is not passed on to next generation.

10. (a) List the three different between ammeter and volt meter in a tabular

form?

(b) Explain why conductors offer resistance to the flow of current?

(c) In a household , 5 tube lights of 40 W each are used for 10 Hrs and an

electric press 500 W for 4 Hrs every day . Calculate the total energy consumed

by the tube lights and press in a months of 30 days?

11.(a) Why does menstruation occur?

(b) What are the functions performed by the testis in human beings?

(c) Draw a labelled diagram of the longitudinal section of a flower.

12. A cloth strip dipped in onion juice is used for testing a liquid ‘X’. The

liquid ‘X’ changes its odour. Which type of an indicator is onion juice ?

The liquid ‘X’ turns blue litmus red. List the observations the liquid ‘X’

will show on reacting with the following :

(a) Zinc granules

(b) Solid sodium carbonate

Write the chemical equations for the reactions involved.

13. State with reasons the mode of connecting all electrical appliances

in common domestic electric circuits.

(b) Which two separate circuits are often used in domestic electric

circuits and why ?

(c) When does an electric short circuit occur ? How can it be

prevented ?

14. (a) Why is nutrition necessary for the human body ?

(b) What causes movement of food inside the alimentary canal ?

(c) Why is small intestine in herbivores longer than in carnivores ?

(d) What will happen if mucus is not secreted by the gastric glands ?

15. Project: make a Educational toy by using eco-friendly

materials

Under the theme Technology for toys

Contains a sub theme (a) Health hazards / technology

(b) toys and games for mathematical thinking used in science

Question number 15 is mandatory for all and to be exhibit for

science exhibition and must submit before 14 November 2020. It

contains internal marks.