Question

The cover of a rectangular book has an area of 20 inches . If the books length is 3 times as long as it’s width explain how to find the exact perimeter of the book cover.

Answer 1

Explanation:

If the books length (L) is three times as long as the width (W), the equation for area is this:

L · W = 20 inches,

3W · W = 20 inches - substituting L for 3W

So then the books perimeter is