Answer:
The period is 0.54 seconds
Step-by-step explanation:
Period (T)
Is the time required for a rotating object to make one complete revolution around a circular path.
If it takes a time t to complete n revolutions, the period is:

The rotating object spins n=24 times in t=13 seconds, thus its period is:

T = 0.54 sec
The period is 0.54 seconds