SOLUTION: The perimeter of a rectangle is 9 times it's width. If the width is 20, what is the length?

Algebra ->  Rectangles -> SOLUTION: The perimeter of a rectangle is 9 times it's width. If the width is 20, what is the length?      Log On


   

Question 23248: The perimeter of a rectangle is 9 times it's width. If the width is 20, what is the length?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Formula: Perimeter = 2l + 2w
9(20) = 2l + 2(20)
7(20) = 2l
l = 7(10) = 70
Cheers,
Stan H.