$\begin{array}{1 1}(A)\;4\pi&(B)\;\large\frac{5\pi}{36}\\(C)\;\large\frac{8\pi}{36}&(D)\;\large\frac{4\pi}{36}\end{array} $

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- $\pi$ radians=$180^{\large\circ}$
- $1^{\large\circ}=(\large\frac{\pi}{180})$ radian=0.01746(approx)

We have $180^{\large\circ}=\pi$radians

$25^{\large\circ}=\large\frac{\pi}{180}$$\times 25$ radians

$\Rightarrow 25^{\large\circ}=\large\frac{5\pi}{36}$ radians

Hence (B) is the correct answer.

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