Question

A well 3 m in radius and 21 m deep is to be dug find the cost of digging the well at Rs1.5 cm per cubic m

Answer 1

Volume of well = π r  x r x h
                         = 22/7 x 9 x 21
                         =594 m3
Cost for 1 m3 = 1.5
=> Cost for 594 m3 = 1.5 * 594
                                = 891