# math

the length of a rectangle is four times its width. if the area is 100 m2 what is the length of the rectangle?

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1. L = Length

W = With

A = Area

L = 4 W

A = L * W

A = 4 W * W

A = 4 W ^ 2

100 = 4 W ^ 2 Divide both sides with 4

25 = W ^ 2

W = sqrt ( 25 )

W = 5 m

L = 4 W = 4 * 5 = 20 m

A = L * W = 20 * 5 = 100 m ^ 2

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