Question

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?
a.
8 hours, 45 minutes
b.
6 hours, 45 minutes
c.
4 hours, 45 minutes
d.
2 hours, 45 minutes

Answer 1

Toronto -> Rio: Rio = Toronto + 2 h. Rio -> Melbourne: Melbourne = Rio + 13 h, so Melbourne = Toronto + 15 h.

Your watch (Melbourne time) showed departure at Sat 9:30 a.m. Melbourne = Toronto +15 h, so departure in Toronto time was 9:30 a.m. Sat −15 h = Fri 6:30 p.m.

Arrival is Rio Sat 3:15 a.m. = Toronto time 3:15 a.m. −2 h = Sat 1:15 a.m.

Flight time = from Fri 6:30 p.m. to Sat 1:15 a.m. = 4 hours 45 minutes.

Answer: c. 4 hours, 45 minutes.