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
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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