Answer:
8 seconds
Explanation:
The time taken by the merry go round to complete one round is called time period.
Number of rounds = 15
Time taken = 2 minutes = 2 x 60 = 120 second
15 rounds are completetd in 120 seconds
1 round completed in 120 / 15 = 8 seconds
So, the time period is 8 seconds.