Question

A rectangular field is 154m long and 121m broad .A well of 14m length and 11m breadth is dug inside the field and soil taken out is spread evenly over the remaining part of the field to thickness of 25cm . Find the depth of the well.

Answer 1

volume of field=l*b*h
=154*121*.25=4658.5
volume of well=l*b*h
=14*11*.25
=38.5
volume of well duged=volume of field-volume of well
=4658.5-38.5
=4620
height =v/l*b
=4620/154=30