The perimeter of a rectangular garden is 72 feet. It's length is 3 times it's width. Find the length and width of the garden

Length is 27 feet and Width is 9 feet.

Given:

Perimeter = 72 feet

Length = 3w

Width = w

Perimeter = 2 (length + Width)

72 feet = 2 (3w + w)

72 feet = 2 (4w)

72 feet = 8w

72 feet / 8 = w

9 feet = w

width = 9 feet

length = 3w = 3*9 = 27 feet