mathematics MCQs – Page 125

Practise multiple-choice questions from mathematics for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

2481. The areas of the two spheres are in the ratio 1: 4. The ratio of their volume is?
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A. 1:8

B. 1:16

C. 1:04

D. 0.086111111

2482. Find the ratio of the curved surfaces of two cylinders of same heights if their radii are in the ratio 1:2.
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A. 1:2

B. 4:01

C. 1:04

D. 2:01

2483. The edges of a cuboid are respectively 3cm, 4cm and 12 cm. Find the length of the diagonal of cuboid.
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A. 5 cm

B. 13 cm

C. 144 cm

D. 19 cm

2484. The radius of a cylindrical vessel is 7cm and height is 3cm. Find the whole surface of the cylinder?
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A. 440 sq cm

B. 132 sq cm

C. 220 sq cm

D. 308 sq cm

2485. If the sides of two cubes are in the ratio 3: 1 the ratio of their total surface area is?
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A. 12:01

B. 8:01

C. 3:01

D. 9:1
2486. 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
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A. 7?

B. 60?

C. 100?

D. 50?

2487. 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
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A. Rs.57

B. Rs.60

C. Rs.52

D. Rs.55

2488. 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

2489. 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

2490. 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>

2491. 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
2492. 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

2493. The area of the floor of a room is 20 m<sup>2
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A. 60 m3

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

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

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

2494. The curved surface of a sphere is 64 ? cm<sup>2
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A. 2 cm

B. 1 cm

C. 4 cm

D. 3 cm

2495. 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.
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A. 7:06

B. 7 : 3

C. 3:07

D. 6:07

2496. How many shots of 1cm radius can be prepared from a sphere of 3cm radius?
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A. 64

B. 36

C. 27

D. 16

2497. 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?
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A. 12 cm

B. 14 cm

C. 8 cm

D. 10 cm

2498. 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
2499. 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

2500. Find the expenditure on digging a well 14m deep and of 3m diameter at Rs.15 per cubic meter?
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A. Rs.1185

B. Rs.1485

C. Rs.1385

D. Rs.1285