I am not good at rates at all and I am unsure of how to do this problem that my teacher gave me. I don't even know where to start, an explanation would be great.

Problem: A circle has a radius of $\displaystyle 10/(pi-1)$ which is the same as the side of a square. Both the radius of the circle and side of the square are growing at 1 in/sec. Find the difference between rates of change of their areas in in/sec.

I would prefer if you solve it out completely, but even just getting me started would be helpful.