a pendulum oscillates 100 times in 5 seconds.find its time period and frequency ?

Frequency,f=No. of oscillations in particular time                 f  =1005=20HzTime period=1f=120=.05s

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No. of Oscillations = 100 
Time Period           =  5 sec.
                       Frequency = No. of Oscillations / Time Period 
                                        = 100 / 5
                                        = 20 Hz 
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