A rectangular garden is to be twice as long as it is wide…
We are given that a rectangular garden is twice as long as it is wide. If we let w = the width of the garden, then we can let 2w = the length of the garden.
We are given that the perimeter of the garden is 360 yards. Using the perimeter formula we can determine the width and length of the garden.
P = 2w + 2l
360 = 2w + 2(2w)
360 = 2w + 4w
360 = 6w
w = 60
Since w = 60, length = 2 x 60 = 120.