SOLUTION: the perimeter of a rectangle is 80cm. If the ratio of its length to its width is 5:3, what are it's dimensions?

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Question 465611: the perimeter of a rectangle is 80cm. If the ratio of its length to its width is 5:3, what are it's dimensions?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,



 P = 2*L + 2*W

 80 = 2*L + 2*W

 40 = L + W

Let x and (40-x) represent the width and length respectively

Question states***

 %2840-x%29%2Fx+=+5%2F3  | Cross Multiplying to solve

     5x = 3(40-x)

     8x = 120

      x = 15cm, the width.  The Length is 25cm.   (40cm-15cm)



CHECKING our Answer***

25/15 = 5/3