A sector of ` 120^{\circ} `cut out from a circle has an area of `9\frac{3}{7} sq cm` The radius of the circle is

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Q 3062312235.     A sector of ` 120^{\circ} `cut out from a circle has an area of `9\frac{3}{7} sq cm` The radius of the circle is
A

3 cm

B

2.5 cm

C

3.5 cm

D

3.6 cm

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