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Volume of a sphere

If the volume...

Question

If the volume and the surface area of a sphere is numerically equal , then find its radius

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Solution

Given surface area = volume then, 4(pi) r2 = 4/3(pi) r3 4 and pi cancelled from both sides then r2 = r3 / 3 3= r 3 / r2

therefore r = 3cm

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