Find the angle in radian through which a pendulum swings if its length is 75cm and the tip describes an arc of length 10cm

Question

$\begin{array}{1 1}(A)\;2\; radian&(B)\;\large\frac{2}{15}\normalsize radian\\(C)\;\large\frac{2}{17}\normalsize radian&(D)\;\large\frac{3}{10}\normalsize radian\end{array}$