A circle is inside a square. The radius of the circle is decreasing at a rate of 4 meters per minute and the sides of the square are increasing at a rate of 1 meter per minute. When the radius is 2 meters, and the sides are 17 meters, then how fast is the AREA outside the circle ut inside the square changing? The rate of change of the area enclosed between the circle and the square is square meters per minute.

A circle is inside a square. The radius of the circle is increasing at a rate of 2 meters per minute and the sides of the square are increasing at a rate of 3 meters per minute. When the radius is 2 meters, and the sides are 15 meters, then how fast is the AREA outside the circle but inside the square changing? The rate of change of the area enclosed between the circle and the square is meters per minute. square

An observer on the ground is 12m away from the foot of the tower 40 m high. A stone is dropped from the top of the tower. How fast in m/s is the distance between the stone and the observer changing after one second?