The length of a rectangle is 5 centimeters less than twice its width. The perimeter of the rectangle is 80 cm. What are the dimensions of the rectangle?

1 Answer
Jun 3, 2016

15 cm x 25 cm

Explanation:

If x is the width w, then the length l is 2x-5

The perimeter p = 2w+2l

So

80 = 2x+2(2x-5)
80 = 6x - 10
6x = 90

:. x = 15

The length is 2*15-5 = 25