38. A hall is 15 m long and 12 m broad. If the sum of the areas of the floor and the ceiling is equal to the sum of the areas of four walls, the volume of the hall is:
A. 720 B. 900
C. 1200 D. 1800
Answer:
2(15 + 12) ×h
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= 2(15 x 12)
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‹=›h= 180/27 m
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= 20/3m
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Volume
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= (15×12×20/3)m3
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‹=›1200 m3.
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