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Length of a Rectangle Side


Date: 8/24/96 at 19:28:24
From: Anonymous
Subject: Length of a Rectangle

I need an equation for this problem:

The length of a rectangle is 9 cm more than half the width. Find the
length if the perimeter is 60 cm.


Date: 8/25/96 at 15:15:32
From: Doctor Robert
Subject: Re: Length of a Rectangle

Let x be the width of the rectangle.  Then x/2 is half the width,  
and the length is x/2 + 9.  

Now the perimeter - which is 60 cm - would be 2 widths plus 2 lengths, so

  60 = 2(x) + 2(x/2 + 9) 

Can you take it from here? 

-Doctor Robert,  The Math Forum
 Check out our web site!  http://mathforum.org/dr.math/   
    
Associated Topics:
Middle School Geometry
Middle School Triangles and Other Polygons

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