A man wants to enclose a rectangular garden adjacent to a river.

Question

The length of the rectangle is two times the width. How many linear feet of fence must he buy if he does not need fencing along the river and the perimeter of the rectangle in 240 feet?

Answer 1

L=2W

P=2L+2W = 240 = 4L+2W = 6W

6W = 240

W = 240/6 = 40 feet

L = 2W = 80 feet

fencing needed is 2W + L = 2(40)+80 = 160 feet