To calculate the duration of the movie, subtract the start time from the end time.
- Start time: 7:20 PM
- End time: 9:05 PM
- From 7:20 PM to 8:00 PM = 40 minutes
- From 8:00 PM to 9:05 PM = 1 hour and 5 minutes, which is 65 minutes
Now, add those two durations together:
40 minutes + 65 minutes = 105 minutes
So, the movie is 105 minutes long, or 1 hour and 45 minutes.