volumes MCQs – Page 3

Practise focused volumes questions with marked answers for exam preparation and subject revision.

volumes Mcqs

41. If a solid sphere of radius 10 cms is moulded into 8 spherical solid balls of equal radius, then surface area of each ball (in cm<sup>2
0

A. 7?

B. 60?

C. 100?

D. 50?

42. A room is 15m long, 4m broad and 3m height. Find the cost of white washing its four walls at 50p per m<sup>2
0

A. Rs.57

B. Rs.60

C. Rs.52

D. Rs.55

43. What is the length of the longest pole which can be kept in a room 12 m long, 4 m broad and 3 m high?
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A. 15 cm

B. 13 cm

C. 12 cm

D. 10 cm

44. The surface of a cube is 24sq cm. Find its volume?
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A. 32 cc

B. 64 cc

C. 8 cc

D. 16 cc

45. The edge of a cube is 2a cm. Find its surface?
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A. 24a2cm2

B. 12a<sup>2</sup>cm<sup>2</sup>

C. 6a<sup>2</sup>cm<sup>2</sup>

D. 8a<sup>2</sup>cm<sup>2</sup>

46. Three cubes of metal whose edges are 9, 12 and 15 cm respectively, are melted and one new cube is made. Find the edge of the new cube?
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A. 19 cm

B. 21 cm

C. 32 cm

D. 18 cm

47. The radius of a cylinder is 2 r units and height is 3 r units. Find the curved surface?
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A. 18 ?r<sup>2</sup>sq units

B. 3 ?r<sup>2</sup>sq units

C. 12 ?r2sq units

D. 6 ?r<sup>2</sup>sq units

48. The area of the floor of a room is 20 m<sup>2
0

A. 60 m3

B. 100 m<sup>2</sup>

C. 400 m<sup>3</sup>

D. 450 m<sup>3</sup>

49. The curved surface of a sphere is 64 ? cm<sup>2
0

A. 2 cm

B. 1 cm

C. 4 cm

D. 3 cm

50. The curved surface area of a cylindrical pillar is 264 m2 and its volume is 924 m3. Find the ratio of its diameter to its height.
0

A. 7:06

B. 7 : 3

C. 3:07

D. 6:07

51. How many shots of 1cm radius can be prepared from a sphere of 3cm radius?
0

A. 64

B. 36

C. 27

D. 16

52. The edges of three iron cubes are 6cm; 8cm; 10cm respectively. A new cube was made by melting them. Find the edge of the new cube?
0

A. 12 cm

B. 14 cm

C. 8 cm

D. 10 cm

53. How many cubes of edge 2 dm can be cut out of a meter cube?
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A. 216

B. 64

C. 50

D. 125

54. The ratio between the radii of two spheres is 1:3. Find the ratio between their volumes?
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A. 9:01

B. 27:01:00

C. 1:27

D. 1:09

55. Find the expenditure on digging a well 14m deep and of 3m diameter at Rs.15 per cubic meter?
0

A. Rs.1185

B. Rs.1485

C. Rs.1385

D. Rs.1285

56. How many meters of carpet 50cm, wide will be required to cover the floor of a room 30m * 20m?
0

A. 1200

B. 600

C. 1000

D. 2400

57. The edges of cuboid are 4 cm; 5 cm and 6 cm. Find its surface area?
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A. 120 cm<sup>2</sup>

B. 15 cm<sup>2</sup>

C. 74 cm<sup>2</sup>

D. 148 cm2

58. A rectangular courtyard, the sides of which are in the ratio of 4:3, cost Rs.600 for paving at 50 p per m<sup>2
0

A. 45 m

B. 25 m

C. 35 m

D. 50 m

59. The dimensions of an open box are 52, 40 and 29 cms. Its thickness is 2 cms. If 1 cm<sup>3
0

A. 8.56 kg

B. 7.756 kg

C. 6.832 kg

D. 7.76 kg

60. If the radius of the sphere is doubled then its volume is increased by?
0

A. 800%

B. 700 %

C. 100%

D. 200%

Showing 41 to 60 of 71 mcqs