10.Howmanycubicmetresof earth must be dug out to sink a well which is – InterviewSolution

1.	10.Howmanycubicmetresof earth must be dug out to sink a well which is 16 m deep and which has a radius of3.5 m? Ifthe earth taken out is spread over a rectangular plot of dimensions 25 m*16m, what is the heightofthe platform so formed?
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