da/dt = 8πr dr/dt
If da/dt = dr/dt, then r = 1/8π
so, now you can find the area and volume.
A spherical balloon expands uniformly as it is inflated. The radius of the balloon in r meters at time t seconds. Find the radius, the volume, and the surface area of the balloon when the rates of increase of the surface area of the balloon and the radius are numerically equal
2 answers
Steve, what is dr/dt? how did you get 1/8pi?
1 answer