Question 512870
diameter of well = 14 m,  radius = 7
depth = 20 m

Volume of mud dug out = pi*r^2*h

V= 3.14*7^2*20
V= 3077.2 m^3

Area of Land = 240* 180 = 43200 sq. m

Volume of the land after filling = L*W*H

dug out mud is the volume increase

3077.2 = 43200*H

H=3077.2/43200

H= 0.0712 m

0.0712 *100 = 7.12 cm 

The height will increase by 7.12 cm

m.ananth@hotmail.ca