The length of a rectangular lawn is measured to twice its width...

Question

The length of a rectangular lawn is measured to twice its width. The perimeter of the lawn is given as 30 m. Find the length and width of the lawn.

Answer 1

l = length

w = width

perimeter = 2 * l + 2 *w = 30

l = 2 * w

substituting:

perimeter = 2 (2 * w) + 2 * w = 30

6w = 30

w = 5

l = 2 * w = 2 * 5 = 10