Explanation: Since you're trying to find the perimeter you need to add up each side. The problem gives away that the length is 10 ft and that the width is 6 ft. In order to find the total length you need to add 10 + 10, you should get 20. Now you do the same to the width, 6 + 6 = 12.
To find the total you need to add 12 and 20 together, 12 + 20 = 32 So the perimeter = 32
