Question: A passenger's hotel is about 50 km from the airport. The airport security check process takes 10 minutes, and the flight check-in counter closes 15 minutes before departure. If the passenger is taking the Guangzhou flight (CZ3116) and the taxi travels at a constant speed of 80 km/h, what is the latest time the passenger should depart from the hotel to ensure timely boarding? (eg: Integer + : + Integer + : + Integer)
Clues:
1. The flight information board shows the row for flight CZ3116, with a scheduled departure time (SCHED) of 07:30 and a destination of Guangzhou (广州).
Answer: 06:27:30
Category: Transportation and Travel