V= π* 3.25² *12
1) Considering that the Volume of a Cylinder is given by Base Area times height
[tex]\begin{gathered} V=\pi\cdot r^2\cdot h \\ V=\pi\cdot(\frac{6.5}{2})^2\cdot12 \\ V=\pi\cdot3.25^2\cdot h \end{gathered}[/tex]2) Note that we have the diameter, so we can state that the answer is
V= π* 3.25² *12