A well of diameter 14 m is dug 15 m deep. The earth taken out of it has been spread evenly

A well of diameter 14 m is dug 15 m deep. The earth taken out of it has been spread evenly

A well of diameter 14 m is dug 15 m deep. The earth taken out of it has been spread evenly to form circular embankment all around the wall of width 7 m. Find the height of embankment.