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December 21, 2014

December 21, 2014

Posted by **tatyana** on Wednesday, March 13, 2013 at 9:17am.

What is the area of circle B?

- math -
**Reiny**, Wednesday, March 13, 2013 at 11:11amareas of circles are proportional to the square of their radii

so

49/area of B = r^2/(3r)^2 = 1/9

area of B = 9(45) or 405 cm^2

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