Respuesta :

Solution

For this case we have the following notation:

L = length

W= Width

For this particular case we know that:

L= 2W

The permimeter is given by:

2L + 2W= 216

Replacing we have:

2(2W)+ 2W= 216

6W= 216

W= 43.2 yd

L= 2*43.2= 86.4 yd