The volume of a right circular cone is computed as follows:
[tex]V=\pi r^2\frac{h}{3}[/tex]
where r is the radius and h is the height of the cone.
Substituting with r = 4 units and h = 13 units, we get:
[tex]\begin{gathered} V=\pi4^2\frac{13}{3} \\ V=\pi16\frac{13}{3} \\ V=\frac{208}{3}\pi\approx69.33\pi \end{gathered}[/tex]
