The length of a rectangle is twice its width. The perimeter is 60 ft. How do you find its area?
Let the width be
The area is
Always draw a picture for this type of question to help you visualize what's going on. When you do that, label the shorter side of your rectangle
Add up the sides and set them equal to
So the width is 10 ft, and the length that is two times as long is 20 ft.
The formula for area is length times width, so plug in our new values:
Hope that helps!!