Two trains leave Las Vegas, one (train A) heading South toward Needles and the other (train B) heading West toward Death Valley. Train A is traveling, on average, 45 mph, while train B is traveling, on average, 50 mph. The conductors of each train are communicating over radio to pass the time, but their communication range is limited.

Train A's radio can communicate up to 125 miles away, while train B's radio can communicate up to 150 miles away. After how long will the trains lose contact with each other? Approximately how far away from Las Vegas will each train be?