Question

A field is in the form of rectangle of length 20 m and width 14 m A 10 m deep well of diameter 7 m is dug in one comer of the field and the earth taken out of
the well is spread evenly over the remaining part of the field. Find the rise in the level of the field.
(Class 10,Ch-13 , support material ques.no.43)
Please answer​

Answer 1

area of field =14×20=280m^2

volume of well =22/7×7/2×7/2×10=385m^3

area of base of the well=22/7×7/2×7/2=38.5m^2

remaining area=280-38.5=241.5m^2

By the given,

volume of earth taken out is evenly spread in the remaining field,

therefore,

385m^3=241.5×h

385/241.5=h

h=1.594....m