Watch A is slow by 15 minutes in a day, and Watch B is fast by 30 minutes in a day. If their watches indicated the same times at 9 o'clock in the morning, then by how much time would watch A be ahead of Watch B that next evening at 6 o'clock?
1
493/8 minutes
2
494/4 minutes
3
495/8 minutes
4
497/8 minutes