I need help with this

Question

The volume of a cylinder is 324pi in.3 and the height of the cylinder is 1 in. What is the radius of the cylinder?

Answer 1

Let's start with our formula for volume of a cylinder, which is V= h*pi*r^2. We are given the volume, height (represented by h in our formula), and know that pi is roughly equal to 3.14; since we have all these variables we can solve for r.

Plugging in all the variables we know, that makes our equation look like:

324*pi=1*3.14*r^2. Divide both sides by pi gives us:

324=r^2. Square root both sides:

r=18 inches.