Question

a simple pendulum takes 42 seconds to complete 24 oscillations. find out the time period of the pendulum.

Answer 1

No. of oscillations completed by the pendulum= 42 
Time taken to complete 42 oscillation= 20 seconds 
Time period= No. of oscillations completed/Time taken 
Time period= 42/20 
= 21/10 (cancelled by 2) 
= 2.1 
Time period= 2.1 seconds

Answer 2

No. of oscillations completed by the pendulum= 42 

Time taken to complete 42 oscillation= 20 seconds 

Time period= No. of oscillations completed/Time taken 

Time period= 42/20 

= 21/10 (cancelled by 2) 

= 2.1 

Time period= 2.1 seconds