The speed ratio of train a and B is 5:4. Train B starts first and goes from station B to station A. when it is 72 kilometers away from station B, train a starts from station a and goes to station B. the distance ratio of the place where the two trains meet is 3:4 from station a and station B. then how many kilometers is the distance between station a and station B?

The speed ratio of train a and B is 5:4. Train B starts first and goes from station B to station A. when it is 72 kilometers away from station B, train a starts from station a and goes to station B. the distance ratio of the place where the two trains meet is 3:4 from station a and station B. then how many kilometers is the distance between station a and station B?

The distance between a and B is 45 × (3 + 4) = 315 (km). A: the distance between a and B is 315 km

The speed ratio of train a and B is 5:4. Train B starts first and goes from station B to station A. when it is 72 kilometers away from station B, train a starts from station a and goes to station B. the distance ratio of the place where the two trains meet is 3:4 from station a and station B. then how many kilometers is the distance between station a and station B?

The distance between a and B is 45 × (3 + 4) = 315 (km). A: the distance between a and B is 315 km

The speed ratio of train a and B is 5:4. Train B starts first and goes from station B to station A. when it is 72 kilometers away from station B, train a starts from station a and goes to station B. the distance ratio of the place where the two trains meet is 3:4 from station a and station B. then how many kilometers is the distance between station a and station B?

The distance between a and B is 45 × (3 + 4) = 315 (km). A: the distance between a and B is 315 km

The speed ratio of train a and B is 5:4. Train B starts first and goes from station B to station A. when it is 72 kilometers away from station B, train a starts from station a and goes to station B. the distance ratio of the place where the two trains meet is 3:4 from station a and station B. then how many kilometers is the distance between station a and station B?

The distance between a and B is 45 × (3 + 4) = 315 (km). A: the distance between a and B is 315 km