A plane leaves at 14:00 in a city using UTC+9. Flight time is 9 hours. Its destination uses UTC+11. What hour (0–23) is it there on arrival? Ignore daylight-saving changes.
Show worked answer
Answer: 1
Convert departure to UTC: 14−9=5. Add flight time 9, then destination offset 11:25. On a 24−hour clock this is 1:00.
Example 2
A plane leaves at 14:00 in a city using UTC+10. Flight time is 5 hours. Its destination uses UTC+8. What hour (0–23) is it there on arrival? Ignore daylight-saving changes.
Show worked answer
Answer: 17
Convert departure to UTC: 14−10=4. Add flight time 5, then destination offset 8:17. On a 24−hour clock this is 17:00.
Example 3
It is 23:00 Monday in UTC+10. What hour (0–23) is it in UTC+13 at that instant?
Show worked answer
Answer: 2
UTC+13 is 3 hours ahead. 23:00+3 hours =02:00 Tuesday.
Put it into practice.
Try a fresh round with worked feedback. Create an account whenever you want to save future progress.