SOLUTION: If the length of a rectangle is 5 times its width and if its area is 180, what is its perimeter?

Algebra ->  Rectangles -> SOLUTION: If the length of a rectangle is 5 times its width and if its area is 180, what is its perimeter?      Log On


   

Question 881712: If the length of a rectangle is 5 times its width and if its area is 180, what is its perimeter?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

     .

A = Lw

   (5w)w = 180

     5w^2 = 180

      w^2 = 36

       w = 6  (Tossing out the negative solution for unit measure)

w = 6 and L = 30

P = 2L + 2w = 60 + 12 = 72units