Hi,



 40ft = 2*L + 2*W

 20ft = = L + W   |Assuming You meant L = 15ft 6"

 20ft - 15ft6" = W

         4ft6" = W

  

RELATED QUESTIONS

The length of a rectangle is 15 feet. The width is 8 feet. What is the perimeter of the... (answered by ewatrrr)

The length of a certain rectangle is twice the width. If the perimeter is 66 feet what is  (answered by checkley77)

the length of a rectangle is 6 ft longer than twice the width. if the perimeter is 66... (answered by FrankM)

The width of rectangle is 5 feet less than its length. If the perimeter of the rectangle... (answered by rfer)

the perimeter of a rectangle is 66 inches. the width of the rectangle is 17 inches less... (answered by josgarithmetic,ikleyn)

the length of a rectangle is 3 feet less than five times its width. the perimeter is 66... (answered by ptaylor)

The length of a rectangle is 12 feet longer than twice the width. If the perimeter is 72... (answered by ewatrrr)

The Width of a rectangle is 8 feet less than the length. If the perimeter of the... (answered by amaya)

The length of a rectangle is 6 feet less than twice the width. The perimeter is 66 feet.... (answered by checkley77)