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 :
\[
16 \mathrm{~cm} \quad\left(\text { use } \pi=\frac{22}{7}\right) \text {. }
\]
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