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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.

  • Maths -

    πr^2h = w*l*h

    π(3.5)^2*40 = 28 * 22 * h

    Solve for h.

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