Solution:
Starting time of the show = 6:15 p.m.
Ending time of the show = 9:30 p.m.
Duration of the show = the time gap between the Starting time of the show and ending time.
= Time difference between 6:15 p.m. to 9:30 p.m.
= Time difference between 6:15p.m. to 9:15 p.m.+ Time difference between 9:15 p.m. to 9:30 p.m.= 3 hrs + 15 minutes
=3 hours 15minutes.
So the duration of the show was 3 hrs 15 mins.