Incorrect. Find the volume of the cylinder and then subtract the volume of two hemispheres, or one sphere. The formula for the volume of a cylinder is $\displaystyle{V}=\pi{{r}}^{{2}}{h}\usepackage{cmbright}\Huge\$ and the formula for the volume of a sphere is $\displaystyle{V}=\frac{{4}}{{3}}\pi{{r}}^{{3}}\usepackage{cmbright}\Huge\$ . Use the values $\displaystyle{h}={100}\usepackage{cmbright}\Huge\$ and $\displaystyle{r}={21}\usepackage{cmbright}\Huge\$ .