Question 932598: The length of a rectangle is 5 times its width. If its area is 125 square feet, what is its dimensions?
Answer by jack.wang5(5)   (Show Source):
You can put this solution on YOUR website! Let A = area = L W, W = width, L = length = 5W.
Therefore A = L W = 5 W W = 5 W^2 , so A = 5 W^2.
Solve W , and thus W = sqrt(A/5).
Since A = 125, therefore W = sqrt(125/5) = 5.
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