Question
A well 20m in diameter is dug 15m deep and the earth
taken out is spread all around it to a width of 6m to form an embankment. The height of the embankment is.Solution
Volume of embankment = Volume of well (volume of earth taken out) π (162-102) h = π×102×15 h =1500/156 =56/5 = 9.6m
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