Question

Can anyone please answer q.no.3..?

Answer 1

Radius=8/2=4m
Depth =21m
well is in shape of cylinder
volume of earth dig =πr²h
=3.14×4×4×21=1055.04m³
SO Option A is correct
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Answer 2

as the well would be in the shape of a cylinder ,

volume of earth dug out = volume of cylindeer
                                       = pi r*r*h
                                       =22/7*4*4*21
                                       =22*16*3
                                       =66*16
                                       =1056 cu m
            
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