Question

A circular well of 21m depth is dug up so that the radius of the well is 1.5m. What is the volume of the earth dug up

Answer 1

here is wat u need is given over here
height,h=21m
radius,r=1.5m
volume of earth dug out= pi*r ^{2}*h 
                                       =22/7*1.5*1.5*21
                                       =148.5

Answer 2

Volume of a cylinder = Volume of well = r²h
=( 22 * 1.5 * 1.5 * 21)/7
=66*2.25 
= 148.50 m³