Question

A well 2 m in radius and 14 m deep is to be dug. What is the cost of digging the well at Rs. 1.20 per cubic meter?

• A. Rs. 112.20
• B. Rs. 110.20
• C. Rs. 220.10
• D. Rs. 211.20

Answer 1

Answer: (D)

The correct option is D Rs. 211.20
Volume of well V=$\pi r^{2}h$
Given h=14 m,r=2 m
$\therefore$ V=$\frac{22}{7}\times 2\times 2\times 14=176m^3$
Cost of digging 1$m^3$=Rs 1.20
Cost of digging 176$m^3$=176$\times$1.20=Rs. 211.20'