Question

If a pendulum takes 40 s to do 20 oscillations so what is its time period

Answer 1

Number of oscillations done by pendulum = 20

Time taken to do 20 oscillations by the pendulum = 40 seconds.

Time period of the pendulum is defined as the time taken to complete one oscillation.

Time period of pendulum = $\frac{40}{20}$

Time period of pendulum = 2 seconds

Hence, the pendulum takes 2 seconds to complete one oscillation.