# A well with 3 m inside diameter is dug 14m deep earth taken out of its is spread all around to width of 4m to form an embankment find the height of embankment

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Answer is in the pic below....

Diagram is also given......

hope it is correct

Diagram is also given......

hope it is correct

Πr²h = Πh(R²- r²)

22/7×3×3×14 =22/7×h(7²-3²)

22×3×3×2 =22/7×h(49-9)

22×3×3×2×7/22 = 40h

h = 22×3×3×2×7/40×22

h = 3.15 m