Question

The length of a rectangle is twice its width. the perimeter of the rectangle is 90 cm. what are the length and width?

Answer 1

L = 2w

2w + 2(2w) = 90
2w + 4w = 90
6w = 90
w = 15

L = 2(15)
L = 30

Length is 30 and width is 15