Hi I've got two related rates problem that I didn't manage to solve.

The first one is:

The area of a square is decreasing at 2 ft^2/s. How fast is the side length changing when it it 8 ft?

The second one is:

The area of a circle is decreasing at a rate of 2cm^2/min. How fast is the radius of the circle changing when the area is 100 cm^2?

I guess the problems are of the same type. Thankful for all the help I can get