Correct Answer: Option E

Explanation

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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