students in mr. halperts class are measuring the width of a rectangle that is 6 2/3 inches. the length of the rectangle is twice its width. what is the perimeter of the rectangle?

Finding Length and Width When You Know Area and Perimeter

If you happen to know the distance around the rectangle, which is its perimeter, you can solve a pair of equations for L and W. The first equation is that for area, A = L ⋅ W, and the second is that for perimeter, P = 2L + 2W