Question

If a circular iron sheet of radius 30 cm is heated such that its area increases at the uniform rate of 6πcm²/hr , then the rate (in mm/hr) at which the radius of the circular sheet increases is.

A. 2.0

B. 1.0

C. 1.1

D. 0.1​

Answer 1

Answer:

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option a is the correct answer.