Question

The rate of change of area of a circle with respect to its radius r at r = 6 cm is ____________.

Options

• ${\displaystyle 12\pi }$

• ${\displaystyle 11\pi }$

• ${\displaystyle 8\pi }$

• ${\displaystyle 10\pi }$

Answer 1

The rate of change of the area of a circle with respect to its radius r at r = 6 cm is ${\displaystyle \underline{12\pi }}$.