To find the duration between 5:15am and 11pm, we need to calculate the difference in hours and minutes between the two times.

First, we subtract the hours:

11pm - 5am = 6 hours

Next, we subtract the minutes:

60 minutes - 15 minutes = 45 minutes

Therefore, the duration between 5:15am and 11pm is 6 hours and 45 minutes.



To find the duration between 8am and 2pm, we again need to calculate the difference in hours and minutes.

First, we subtract the hours:

2pm - 8am = 6 hours

Since we are looking for the duration between two times within the same day, we do not need to consider the minutes.

Therefore, the duration between 8am and 2pm is 6 hours.



To find the duration between 0930 hours and 2245 hours, we need to calculate the difference in hours and minutes.

First, we subtract the hours:

2245 hours - 0930 hours = 1315 hours

Next, we subtract the minutes:

60 minutes - 30 minutes = 30 minutes

Therefore, the duration between 0930 hours and 2245 hours is 1315 hours and 30 minutes.



To find the duration between 10:45pm and 1:30am, we need to consider that the times are on different days.

First, we calculate the duration until midnight:

12am - 10:45pm = 1 hour and 15 minutes

Next, we calculate the duration from midnight to 1:30am:

1:30am - 12am = 1 hour and 30 minutes

Finally, we add the durations together:

1 hour and 15 minutes + 1 hour and 30 minutes = 2 hours and 45 minutes

Therefore, the duration between 10:45pm and 1:30am is 2 hours and 45 minutes.