Question

A square is inscribed in a circle. As the square expands, the circle expands to maintain the four points of intersection. The perimeter of the square is increasing at the rate of 8 in/sec. A) Find the rate at which the circumference of the circle is increasing. B) At the instant when the area of the square is 16 in^2, find the rate at which the area enclosed between the square and the circle is increasing.

Answer 1

This is for part a. Can you do the rest?