It is known that the speed of the local train is 56 times that of the express train. The two trains are going towards each other at the same time from station a and B, and they meet at the place 4 kilometers away from the midpoint. How many kilometers is the distance between station a and B?

(4 × 2) / (65 + 6 − 55 + 6) = 8 / 111, = 88 km. A: the distance between the two stations is 88 km

The speed of the local train is 57 times that of the express train. The two trains leave from station a and station B at the same time and run in opposite directions. They meet 36 kilometers away from the midpoint. How many kilometers did the express train travel when they meet?

(36 × 2) / (7-5) × 7, = 72 × 2 × 7, = 252 (km); a: the express drove 252 km when it met