That's a total of five hours !
5 hours
13
13
5 hours
9am, 10am, 11am, 12pm, 1pm, 2pm, 3pm, 4pm, 5pm. 8 hours.
6 hours, if they're both in the same day.
IF they are on the same day, then the interval is 6 hours.
4 hours if it's on the same day
3pm to 10pm is 7 hours.
When it is 3PM in the UK, it is 10AM in the Dominican Republic. The Dominican Republic is 5 hours behind the UK.
Assuming you mean on the same day... 5 hours 30 minutes.
3 hours between 12pm and 3pm