Crey | The time rate of change of the radius of a sphere is 1/2π. When it’s radius is 5cm, what will be the rate of change of the surface of the sphere with time? 10 sq cm, 20 sq cm, 30 sq cm, 40 sq cm

Question

The time rate of change of the radius of a sphere is 1/2π. When it’s radius is 5cm, what will be the rate of change of the surface of the sphere with time?

Options :

10 sq cm
20 sq cm
30 sq cm
40 sq cm

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