Question 468263
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Hi,
<img src="http://upload.wikimedia.org/wikipedia/commons/thumb/d/da/PerimeterRectangle.svg/200px-PerimeterRectangle.svg.png">
length is 5cm less than twice it's width.
Let x and (2x-5cm) represent the width and length respectively.  
    x = 15cm
  2*15cm + 2*25cm = P = 80cm