Question

Marianne wants to build a walkway around her rectangular garden. The width of her garden is one-third the length. The perimeter of Marianne’s garden is 40 feet. What is the length and width of her garden?

Answer 1

`w=(1)/(3)l\\P=2l+2w=40\\l+w=20\\l+((1)/(3)l)=20\\(4)/(3)l=20\\l=15\\\\w=(1)/(3)(15)\\2=5`

Length = 15
Width = 5