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The length of a rectangle is four times its width. if the area of the rectangle is 400 yd2 , find its perimeter.
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The length of a rectangle is four times its width. if the area of the rectangle is 400 yd2 , find its perimeter.

User Leon Joosse
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2 Answers

2 votes
Let W = width, and L = length.

L = 4W

A = LW

400 = (4W)(W)

400 = 4w^2

4W^2 = 400

W^2 = 100

W = 10

The width is 10 yd, and the length is 40 yd.
User RLave
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7.8k points
6 votes
I don’t know for sure but the length is 40 and the width is 10.
User Ganbayar Gansukh
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8.2k points
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