Volume and Surface Area - Questions & Answers | Exam2Win

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21. The surface area of a cube is 726 cm2. Its volume is :

A. 1300 m2

B. 1331 m2

C. 1452 m2

D. 1542 m2

Explanation: ANSWER : 1331 m2

22. Given that 1 cubic cm of marble weight 25 gms, the weight of a marble block 28 cm in width and 5 cm thick is 112 kg. the length of the block is :

A. 36 cm

B. 37.5 cm

C. 32 cm

D. 26.5 cm

Explanation: ANSWER : 32 cm

23. Half cubic metre of gold sheet is extended by hammering so as to cover an area of 1 hectare. The thickness of the sheet is :

A. 0.5 cm

B. 0.05 cm

C. 0.005 cm

D. 0.0005 cm

Explanation: ANSWER : the volumes of two cubes are in the ratio 8 : 1, the ratio of their edges, is :

24. A river 2 m deep and 45 m wide is running at the rate of 3 km/hr. The amount of water that runs into the sea per minute, is :

A. 4500 m3

B. 27000 m3

C. 3000 m3

D. 2700 m3

Explanation: ANSWER : 4500 m3

25. The maximum length of a pencil that can be kept in a rectangular box of dimension 8 cm x 6 cm x 2 cm, is :

A. 2 cm

B. 2 cm

C. 2 cm

D. 10 cm

Explanation: ANSWER : 2 cm