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 circular ring of width 3m to form an embankment.find the height of the embankment?
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2×21=3×h
=h=2×7
=h=14m
hope you like my answer
=h=2×7
=h=14m
hope you like my answer
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