A circular disc is divided into 6 equal sectors. If the area of one sector is 66 cm², what is the radius of the disc?

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Accepted Answer

1. One sector area is 66 cm², so total circle area is $A=6	imes66=396\ 	ext{cm}^2$.

2. Circle area formula: $A=\pi r^2$. So $\pi r^2=396$.

3. Solve for $r$: $r=\sqrt{396/\pi}\approx11.22\ 	ext{cm}$. This matches option (c).

FINAL_ANSWER: c

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