A well of diameter 4m is dug 21m deep. The earth taken out of it has been spread evenly all around it in the shape of a ring of width 3m to form an embankment. Find the height of the embankment.
A well of diameter 4m is dug 21m deep. The earth taken out of it has been spread evenly all around it in the shape of a ring of width 3m to form an embankment. Find the height of the embankment.