The area of a circular oil spill on the surface of a lake is increasing at a constant…

MATHEMATICS · Subjective · A Level · Mathematics · Differentiation · Differentiation

Problem

The area of a circular oil spill on the surface of a lake is increasing at a constant rate of 20 m

^{2}

/min. Find the rate at which the radius of the spill is increasing at the moment when the radius is 5 m. Give units in your answer.