if the diameter is 16 mm, then the radius is half that, namely 8 mm, thus
[tex]\bf \textit{volume of a cylinder}\\\\
V=\pi r^2 h\qquad
\begin{cases}
r=radius\\
h=height\\
-----\\
r=8\\
h=5.7
\end{cases}\implies V=\pi \cdot 8^2\cdot 5.7\implies V=364.8\pi [/tex]
