Question 10695: FIND THE DIMENSIONS OF A RECTANGLE WHOSE PERIMETER IS 56 INCHES IF THE LENGTH IS THREE TIMES THE WIDTH. Answer by tran3209(100) (Show Source):
You can put this solution on YOUR website! Let X be the width of the rectangle in inches: W = X.
The length of the rectangle is 3 times the width : L = 3X.
The perimeter of the rectangle : P = 2 W + 2 L
P = 2 ( W + L )
Replace W and L by X : P = 2 ( X + 3X )
Replace P by 56 " : 56 = 2(4X)
56 = 8 X
X = 56/8
X = 7
The Dimention of the rectangle Width 7", Length 21"
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