SOLUTION: The length of a rectangular field is three times its width. The perimeter of the field is 144 cm. Find it's area

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Question 875499: The length of a rectangular field is three times its width.
The perimeter of the field is 144 cm. Find it's area
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,



P = 2L + 2w = 144cm

     L+ w = 72    L = 3w

    3w + w = 72    

       4w = 72

        w = 18cm  and L = 54cm

A = Lw = 972cm^2