There are two cities P and Q. A car A starts from city P at 6:00 am and reaches city Q at noon. Another car B starts from city Q at 7:00 am and reaches city P at 3:00 pm.
Another car C starts from city P, an hour earlier than car A. If car C meets car A and car B simultaneously, then how much time would the car C require traveling from city P to city Q?
- 417 hours
- 263 hours
- 689 hours
- cannot be determined