if you check the picture below, you'll see how big is the angle the minute hand traveled
now [tex]\bf s=r\theta\qquad
\begin{cases}
s=\textit{arc's length}\\
r=radius\\
\theta=\textit{angle in radians}\\
--------------\\
r=2\\
\theta=11\pi
\end{cases}[/tex]
"s" is how much the minute hand traveled