Question

Please help with question, thanks

Answer 1

The volume of a cone can be expressed as:


`V = (1)/(3) \pi r^(2)h \\ \\ h=20 \\ \\ so, \\ \\ V= (1)/(3) \pi r^(2)*20 \\ \\ (3V)/(20 \pi )= r^(2) \\ \\ r= \sqrt{ (3V)/(20 \pi )}`

Thus, 2nd option gives the correct answer