A cone is formed by bending a sector of a circle having an angle of 210^o. Find the radius of the base of the cone if the diameter of the circle is 12cm.

12cm

7.00cm

1.75cm

21cm

3.50cm

Correct answer is E

If diameter of the circle = 12cm; radius of the circle(L) = $\frac{12}{2}$

= 6cm

$\frac{\theta}{360}$ = $\frac{r}{L}$ where $\theta$ = 210 $\theta$ , L = 6cm

$\frac{210}{360}$ = $\frac{r}{6}$

where r = radius of the base of the cone

V = $\frac{1260}{360}$

= 3.50cm

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A cone is formed by bending a sector of a circle having an angle of 210^o. Find the radius of the base of the cone if the diameter of the circle is 12cm.

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A cone is formed by bending a sector of a circle having an angle of 210o. Find the radius of the base of the cone if the diameter of the circle is 12cm.

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A cone is formed by bending a sector of a circle having an angle of 210^o. Find the radius of the base of the cone if the diameter of the circle is 12cm.