SOLUTION: The length of a rectangle is 3 cm longer than its width. If the perimeter of the rectangle is 30 cm, find its area.

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Question 709488:
The length of a rectangle is 3 cm longer than its width.
If the perimeter of the rectangle is 30 cm, find its area.
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
L=W+3
P=2L+2W
30=2(W+3)+2W
30=2W+6+2W
30-6=4W
24=4W
24/4=W
6=W ANS.
L=6+3=9 ANS.
PROOF:
30=2*9+2*6
30=18+12
30=30
AREA=LW
AREA=6*9=54 cm^2 ANS.