The area of a circle is $394.24$ $c m^{2}$ . What is the radius of the circle ?

11.2 c m

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12.1 m

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13.5 m

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15.0 m

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Solution

The correct option is A $11.2 c m$
Area of the circle $= 394.24 c m^{2}$
$⟹ π r^{2} = 394.24$
$⟹ r^{2} = \frac{394.24 \times 7}{22}$
$⟹ r^{2} = 125.44$
$⟹ r = 11.2 c m$

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