Question:

The radius of a sphere is increasing at a rate of 7.5 meters

Last updated: 7/9/2022

The radius of a sphere is increasing at a rate of 7.5 meters

The radius of a sphere is increasing at a rate of 7.5 meters per minute. At a certain instant, the radius is 5 meters. What is the rate of change of the surface area of the sphere at that instant (in square meters per minute)?