From 9 AM to 3:40 PM is a duration of 6 hours and 40 minutes. To break it down, from 9 AM to 3 PM is 6 hours, and then adding the additional 40 minutes results in a total of 6 hours and 40 minutes.
12 hours.
From 9am to 6:30pm is 9 hours and 30 minutes.
21
21 hours
6 hours
5 Hours
There are zero hours between 9 am and 9 am.
11 hours
5.7
Twelve hours
21
20