The volume of a cone with radius rr and height h is given by:

\(\displaystyle{V}=\frac{{1}}{{3}}π{r}^{{2}}{h}\)

Substitute r=9 ft and h=19 ft:

\(\displaystyle{V}=\frac{{1}}{{3}}π{\left({9}\right)}^{{2}}{\left({19}\right)}\)

\(\displaystyle{V}={513}π≈{1611.63}{f}{t}^{{3}}\)

\(\displaystyle{V}=\frac{{1}}{{3}}π{r}^{{2}}{h}\)

Substitute r=9 ft and h=19 ft:

\(\displaystyle{V}=\frac{{1}}{{3}}π{\left({9}\right)}^{{2}}{\left({19}\right)}\)

\(\displaystyle{V}={513}π≈{1611.63}{f}{t}^{{3}}\)