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If radius and height of a cylinder is r and A, then find the rate of change of surface area with respect to its radius.

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If radius and height of a cylinder is r and A, then find the rate of change of surface area with respect to its radius.

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Radius of cylinder = r

and Height of cylinder = h

Rate of change of surface area w.r.t. r, = ds/dr

Surface area of cylinder S = 2πr2 + 2πrh

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