$\begin{array}{1 1}(A)\;13\pi\;radian&(B)\;15\pi\;radian\\(C)\;12\pi\;radian&(D)\;\pi\;radian\end{array} $

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- Angle rotated in 360 revolution =$2\pi$ radians

Angle rotated in one revolution =$2\pi$ radians

$\therefore$ Angle rotated in 360 revolution =$360\times 2\pi$ radians

$\Rightarrow$ Angle turned in one minute or 60 sec=$360\times 2\pi$

Hence angle turned in 1 sec=$\large\frac{360\times 2\pi}{60}$

$\Rightarrow 12\pi$ radians

Hence (C) is the correct answer.

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