SOLUTION: A rectangles length is three times it width. The area is 27 inches. Find the perimeter

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Question 905239: A rectangles length is three times it width. The area is 27 inches. Find the perimeter
Answer by Math_Boss(45) About Me  (Show Source):
You can put this solution on YOUR website!
l=3w
A=27
A=lw
Substitute l=3w
A=3w%2Aw
A=3w%5E2
27=3w%5E2
27%2F3=%283%2Aw%5E2%29%2F3
9=w%5E2
w=3
w=-3 (reject)
l=3%2A3=9
P=2%28l%2Bw%29
P=2%289%2B3%29
P=24
Ans:24 inches