The area of a circle is 394.24 $c m^{2}$ . Then the radius of the circle in cm is _______.

11.4

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11.3

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11.2

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11.1

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Solution

The correct option is C
11.2

A = $π r^{2}$

r = $\sqrt{\frac{A}{π}}$ = $\sqrt{\frac{394.24}{π}}$ = 11.2cm

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