A well with 14 m diameter is dug 8 m deep. The earth taken out of it has been evenly spread all around it to a width of 21 m to form an embankment. Find the height of the embankment.
Given,
Diameter of well = 14 m
Radius of well = 
depth of well = 8 m
so,
Amount of earth dug out from well =
This earth is spread out on width of 21 m.
= Area ×h = 1232
= 
= 
=
Height of embankment = 53.3 cm
22