A well with an internal diameter of 12m is dug 15m deep. The earth taken out of it is spread all around to a width 3m to form an embankment. Find the height of the embankment
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Vol of earth taken out= πr²h = (22/7)*7*7*15= 2310 m³
Area of the embankment = π*(R²-r²)
Width of embankment= 7 m. So R= 7+7= 14 m
Area= (22/7)*(14²-7²)= 462 m²
Therefore, height of embankment= 2310 m³/462 m² = 5m
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