A pendulum oscillates 20 times in 4 seconds. Find its time period

0.001 s e c

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0.1 s e c

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0.2 s e c

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0.05 s e c

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Solution

The correct option is C $0.2 s e c$
$20$ oscillation takes $4$ seconds so for one oscillations takes $4 / 20 s e c = 0.2 s e c$

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