21 hours
There are 16 hours from 4 am to 8 pm. 4 am to 4 pm is 12 hours, then 4 pm to 8 pm is another 4 hours.
There are 5 hours from 11 AM to 4 PM. You can calculate this by counting the hours: 11 AM to 12 PM is 1 hour, 12 PM to 1 PM is another hour, and so on until you reach 4 PM. Therefore, the total is 5 hours.
4 hours, 20 minutes 4 and 1/3 hours
It is seven hours from 9 AM to 4 PM.
From 10:30 AM to 4:30 PM is a total of 6 hours. You can calculate this by counting the hours from 10:30 AM to 4:30 PM, which includes 11:30 AM, 12:30 PM, 1:30 PM, 2:30 PM, 3:30 PM, and finally 4:30 PM. Therefore, the duration is 6 hours.
3 hours
Assuming 9:30am to 1:30pm or pm to am, 4 hours, if am to am or pm to pm, it is 20 hours.
There are 16 hours from 4 am to 8 pm. 4 am to 4 pm is 12 hours, then 4 pm to 8 pm is another 4 hours.
4 and 1/4
There are 5 hours from 11 AM to 4 PM. You can calculate this by counting the hours: 11 AM to 12 PM is 1 hour, 12 PM to 1 PM is another hour, and so on until you reach 4 PM. Therefore, the total is 5 hours.
4 hours, 20 minutes 4 and 1/3 hours
There are 5 hours between 4 pm and 9 pm
It is seven hours from 9 AM to 4 PM.
2 hours
One to five is either 4 hours or 16 hours, depending on whether the times are AM or PM. Four hours if both are AM or PM, 16 hours if one is AM and the other is PM.
There are 6 hours between 8 am and 2 pm.
Two hours.