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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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