If the perimeter of a rectangle pool is 480 yards if the length is 10 yards less than four times the width find the length and the width

Answer 1

perimeter = 2 * length (l) + 2 * width (w)

l = 4w - 10

480 = 2 * (4w - 10) + 2w

480 = 8w - 20 + 2w

480 = 10w - 20

500 = 10w

w = 50

l = 4w - 10 = 4(50) - 10 = 190