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

Correct answer: D. Rs.1485

  • A. Rs.1185
  • B. Rs.1285
  • C. Rs.1385
  • D. Rs.1485

Explanation

The well is a cylinder with radius 3 m ÷ 2 = 1.5 m and height 14 m. Its volume is π × (1.5 m)² × 14 m = 31.5π m³ = 99 m³ using π = 22/7, so the cost is 99 m³ × Rs.15 per m³ = Rs.1485. The likely wrong choice is Rs.1185, which comes from an incorrect cylindrical volume or cost calculation.

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