SOLUTION: The length of a rectangle is three times its width. If the area of the rectangle is 108cm2, what is its perimeter?

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Question 1022142: The length of a rectangle is three times its width.
If the area of the rectangle is 108cm2, what is its perimeter?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
x*3x=108
3x^2=108
x^2=108/3
x^2=36
x=sqrt36
x=6
3x=18
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2*6+2*18=48 cm