A 40m deep well with radius 3.5m is dug and the earth taken out is evenly spread to form a platform of dimensions 28m by 22m.find the hight of the platform.

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A 40m deep well with radius 3m is dug and the earth taken out is evenly spread to form a platform of dimensions 28m by 22m.find the heiht of the platform.

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50m

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