SOLUTION: A rectangle is four times as long as it is wide. If the area of the rectangle is 1600 cm squared, what are its dimensions?

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Question 721997: A rectangle is four times as long as it is wide. If the area of the rectangle is 1600 cm squared, what are its dimensions?
Answer by MithrilKnights(8) About Me  (Show Source):
You can put this solution on YOUR website!
We let the length be 4x
Let the width be x
So, 4x*x = 1600 cm^2
So, 4x^2 = 1600
So, x^2 = 400 and x=20
Therefore, plugging them into the previous lengths we get,
4x = 80
x = 20
So the dimensions are 80 x 20.
And 80 x 20 = 1600, which works