A well of diameter 3.5 m is dug 16 m deep the earth taken out is spread evenly to form a rectangular platfrom of base 11 m× 7 m find the height of the platform
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given: well :d = 3.5 m or r= 1.75 m , h = 16m
platform: L = 11m and B = 7m H = ?
here volume of earth removed = volume of earth used to construct the platform
V1 well = V2 platform
pi*r^2*h = L*B*H
22/7*1.75*1.75*16 = 11*7*H
therefore H = (22*1.75*1.75*16) / 11*7*7
= 2 metres
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