posted by Suzanne .
If the sun is directly overhead at 12 noon at your location and GMT (Greenwich Mean Time) is 10:00pm, what is your approximate longitude?
Check this site to see what place is 10 hours behind London and the GMT.
(Broken Link Removed)
Then, you can use a map to see the closest longitude line.
GLOBE/GEOGRAPHY HELP -
I DON'T KNOW