2 hours, so maybe you could catch some of it?
Ah, let's see then... The exam itself starts at 12:30, however it's recommended I be there at least 15 minutes early. It takes me about 15 minutes to walk over to my school, thus I'll have to leave at 12. The exam, being an hour, should end at 1:30 then. Add in another 15 minutes of walking back, and I should be home in time to catch at the most.. 15-20 minutes left.
Dammit