Two trains are 600 miles apart, traveling towards each other on the same tracks. One is going 65 mph, the other is going 55 mph. There is a bird that starts in the same direction as the 65 mph train, but is flying at 75 mph. It will continue flying until it reaches the 55 mph train at which point it immediately turns around and begins flying the opposite direction. It will continue flying until it reaches the front of the 65 mph train again, at which point it will again turn around and fly in the opposite direction. It will continue flying between the two trains in this manner until it is crushed. How far will the bird fly?
