Mathematics
NULL
Medium
Question
Find the expenditure on digging a well 14 m deep and of 3 m diameter at Rs. 15 per cubic metre.
A
Rs.1185
B
Rs.1285
C
Rs.1385
D
Rs.1485
✓ Official correct answer
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A
Rs.1185
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B
Rs.1285
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C
Rs.1385
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D
Rs.1485
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Explanation
Volume = πr²h = (22/7)×(1.5)²×14 = 99 m³. Cost = 99 × 15 = Rs. 1485.