Question

Find the volume of the earth dug out from a circular well of 24.5 m deep and 3 m radius?

Answer 1

Volume of a cylinder is πr^2h
So volume of earth dug out= 3.14x9x24.5=692.37
${m}^{3}$

Answer 2

the volume of the earth dug out will be equal to the volume of the cylinder which is
$\pi {r}^{2} h$
so, 22/7*24.5*3*3
=692.37 m^3