#### Problem 14E

(a) What quantities are given in the problem?

(b) What is the unknown?

(c) Draw a picture of the situation for any time $t$.

(d) Write an equation that relates the quantities.

(e) Finish solving the problem.

14. If a snowball melts so that its surface area decreases at a rate of $1 \mathrm{~cm}^{2} / \mathrm{min}$, find the rate at which the diameter decreases when the diameter is $10 \mathrm{~cm}$.