# How do you solve for R in #a= 2piR^2 + 2piRh#?

##### 2 Answers

Jul 12, 2016

#### Explanation:

Notice we have a quadratic in R here:

We can use the quadratic formula:

In the second fraction, we can rewrite the denominator from

Our solution becomes:

Jul 12, 2016

#### Explanation:

We can now solve for