Find the angles in degrees through which a pendulum swings if its length is \( 50 \mathrm{~cm} \...

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Find the angles in degrees through which a pendulum swings if its length is \( 50 \mathrm{~cm} \) and the tip describes an arc of length :
\( 26 \mathrm{~cm}\left(\right. \) use \( \left.\pi=\frac{22}{7}\right) \)
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