The length of a rectangle is six times it's width. If the area is 216 inches squared, find its perimeter

So first to find the perimeter, you need to find the lengths of the sides. Since you have the area, you know that 216=length x width. Use w for width, and 6w for length (since length is 6 times the width). So 216 = 6w x w = 6w^2. Divide this by 6 and you get 36=w^2. So now we know that width=6. And we know that length is 36. Now all you have to do is add those together. 36+36+6+6=84. Perimeter = 84 inches. (you can check your work by multiplying 36 x 6 which equals 216: the area you were given).

I had a problem like this but it was different but what i divided was 216 divided by 12 and got 18 and 216 divided by 6 and got 36