Mathematics

Problem

A circle’s radius is increasing at a constant rate of

3\text{ cm/s}

. What is the instantaneous rate of change of the circle’s circumference when the radius is

10\text{ cm}

? a)

20\pi\text{ cm/s}

60\pi\text{ cm/s}

6\pi\text{ cm/s}

30\pi\text{ cm/s}