SOLUTION: The length of a rectangle is four times its width. If the area of the rectangle is 400ft^2 , find its perimeter.

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Question 1083660: The length of a rectangle is four times its width.
If the area of the rectangle is
400ft^2
, find its perimeter.
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
L=4W
L*W=400
4W*W=400
4W^2=400
W^2=100
W=10
L=40
perimeter is 2L+2W=100 units.