SOLUTION: If the radius of a circle is increased by 10% then the area is increased by

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Question 357127: If the radius of a circle is increased by 10% then the area is increased by
Answer by rfer(16322) About Me  (Show Source):
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3.14*10^2=314
3.13*11^2=380
66/314=.21=21%
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3.14*20^2=1256
3.14*22^2=1520
264/1256=.21=21%
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