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A well with inner radius 4m is dug 14m deep earth taken out of it has been spread evenly all around a width of 3m it to form an embankment. Find the height of the embankment?

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Given that inner radius of a well (a) = 4m

Depth of a well (h) = 14m

Given well is spread evenly to form an embankment

Width of an embankment = 3m

Outer radii of a well (R) = 4 + 3 = 7 m

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