Question 853067
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Hi,
<img src='http://img585.imageshack.us/img585/479/rectangle.png' border='0'/></a>
Let w represent the width
P = 2L + 2w = 30in   
0r  L + w = 15in
   3w + w = 15
    4w = 15
     w = 15/4 in and length is 45/4 in 
Dimensions are 
   3 3/4 by 11 1/4 inches