When it is 1:00 a.m. in Toronto, it is 3:00 a.m. in Rio de Janiero, and when it is 10:00 a.m. in Rio de Janiero, it is 11:00 p.m. in Melbourne. You leave Toronto to fly to Rio de Janiero, but you accidentally left your watch on Melbourne time. Your watch says that you leave Toronto at 9:30 a.m. on Saturday. When you arrive in Rio de Janiero, the local time is 3:15 a.m. on Saturday. How long was your flight?

Answer:6 hours, 45 minutesExplanation:When it is 1:00  a.m. in Toronto, it is 3:00  a.m. in Rio de janiero.It means that the time in toronto is 2 hrs past than Rio de janieroWhen it is 10:00  a.m. in Rio de janiero, it is 11:00 p.m. in Melbourne.It means that the time in Rio de janiero is 1 hr past than MelbourneThus, time in toronto is 3 hr past than Melbourne.Leave at 9:30 a.m according to MelbourneSo, actual time in toronto = 6:30 amReach at 3:15 am in Rio de Janiero,  So time in toronto is 1 : 15 amThus, the time gap is 6 hrs and 45 mints.