It takes 0.2s for a pendulum bob to move from mean position to one end. What is the time period of pendulum?

As we know that,

Time period = 4 x (time a pendulum bob takes to move from mean position to one end).

Given,

Time a pendulum bob takes to move from mean position to one end = 0.2s

Substituting the value in the equation above we get,

Time taken to complete one oscillation(T) —

$= (4 \times 0.2)s \\[0.5em] = 0.8s \\[0.5em]$

Hence, time period of the pendulum = 0.8s