SOLUTION: the perimeter of a rectangle is 100 ft. if its width is four times the length, then what is the area?

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Question 397638: the perimeter of a rectangle is 100 ft. if its width is four times the length, then what is the area?
Answer by richard1234(5390) About Me  (Show Source):
You can put this solution on YOUR website!
If the length is L and the width is 4L, then

2(L + 4L) = 100 --> L + 4L = 50 --> L = 10, 4L = 40

The dimensions are 10 and 40, so the area is 400.