[tex]\begin{gathered} \text{Volume of a cone = }\frac{1}{3}\pi r^2h \\ r=11\operatorname{km},\text{ h=22km} \\ \text{Volume = }\frac{1}{3}\text{ x 3.14 x 11 x 11 x 22} \\ \\ =2786.226667 \\ \approx2786.23km^3(\text{nearest hundredth)} \end{gathered}[/tex]
