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The length of a rectangle is a two-digit number with identical digits (aa). The width is 1/10 of the length. The perimeter is 2 times the area of the rectangle. Find the length and the width. 

 Jan 16, 2017
 #1
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L = lenght

1/10 L = width

perimeter = L + L + 1/10 L + 1/10L =  2 2/10 L

area = L x 1/10L

 

2 x area = perimeter

2 x L  x 1/10 L = 2 2/10  L     Divide both sides by L

 2/10 L  = 2 2/10

L = 22/10 x  10/2

L = 220/20  ===== 11   then  W = 11/10

 Jan 16, 2017
edited by ElectricPavlov  Jan 16, 2017

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