surface area ...

use the surface are equation to solve for h in terms of w, then substitute for h in the volume equation ...

you are given that ...2. A stone is thrown into a lake and t seconds later after the splash the diameter of the circle of the ripples is t meters.

a. Express the circumference C of this circle as a function of t.

b. Express the area A of this circle as a function of t.

a. hint ...

b. two hints ... and