rotation
the volume of the cone is
[tex]V=\frac{\pi\times r^2\times h}{3}[/tex]
where the radio is 2 and the height is 4
[tex]V=\frac{\pi\times(2)^2\times(4)}{3}[/tex][tex]\begin{gathered} \frac{\pi\times4\times4}{3} \\ =\frac{16\pi}{3}\approx16.75 \end{gathered}[/tex]
