Respuesta :

The volume of a cone can be expressed as:

[tex]V = \frac{1}{3} \pi r^{2}h \\ \\ h=20 \\ \\ so, \\ \\ V= \frac{1}{3} \pi r^{2}*20 \\ \\ \frac{3V}{20 \pi }= r^{2} \\ \\ r= \sqrt{ \frac{3V}{20 \pi }} [/tex]

Thus, 2nd option gives the correct answer