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Volume and Surface Area - Questions and Answers

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16. The length of longest pole that can be placed on the floor of a room is 10 m and the length of the longest pole that can be placed in the room is 10 m. The height of the room is :
A. 6 m
B. 7.5 m
C. 8 m
D. 10 m
Explanation: ANSWER : 10 m
17. The length of longest rod that can be placed in a room 20 m long. 16 m broad and 12 m high, is :
A. 20 m
B. 16.4 m
C. 48 m
D. 28.2 m
Explanation: ANSWER : 28.2 m
18. The volume of a cube is 512 cm2. Its surface area is :
A. 64 cm2
B. 256 cm2
C. 384 cm2
D. 512 cm2
Explanation: ANSWER : 384 cm2
19. Two cubes have volumes in the ratio 1 : 27. The ratio of their surface areas is :
A. 1 : 3
B. 1 : 8
C. 1 : 9
D. 1 : 18
Explanation: ANSWER : 1 : 9
20. The surface area of a cube of side 27 cm. is :
A. 2916 cm2
B. 729 cm2
C. 4374 cm2
D. 19683 cm2
Explanation: ANSWER : 4374 cm2
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