A hemispherical tank water tank, shown to the right, has a radius of 6 meters and is losing water. The area of the surface of the water is square meters, where h is the depth, In meters, of the water in the tank. When h= 3 meters, the depth of the water is decreasing at a rate of0.5 meters per minute. At that Instant, at what rate Is the area of the water's surface decreasing with respect to time?Please explain how to get the area equation in this question, which A=12pi*h-pi*h^2