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Thread: Word Problem
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Old 06-17-2008   #5
Sillysidley

 
Join Date: Oct 2006
Posts: 822
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Well, since we let the radius of the smaller circle be r so the bigger one is 2r-1, we can convert what it says to an equation: Since the difference of the areas is 33 pi, we have , so we can divide out pi.
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