Answer:
length = 23 inches , width = 4 inches
Step-by-step explanation:
let width be w then length l = 2w + 15
the perimeter P is calculated as
P = 2l + 2w
given P = 54 , then
2(2w + 15) + 2w = 54
4w + 30 + 2w = 54
6w + 30 = 54 ( subtract 30 from both sides )
6w = 24 ( divide both sides by 6 )
w = 4
l = 2w + 15 = 2(4) + 15 = 8 + 15 = 23
the length is 23 inches and width is 4 inches
