1. ## Sphere Problem

The radius of a sphere increases at a constant rate.

Prove that the rate of chance of the volume is proportional to the surface area.

2. Originally Posted by Skyrim
The radius of a sphere increases at a constant rate.

Prove that the rate of chance of the volume is proportional to the surface area.
$\displaystyle \frac{dV}{dt} = \frac{dV}{dr} \cdot \frac{dr}{dt}$.