Question

one day as you go for an evening walk you see a turnel and walk into it just as you reach two fifth of a tunnel you hear a train that is moving at a constant speed coming behind you if you run backat a speed of 10m/s you will reach at the entrance of the tunnel just as the train enter the tunnel if you run forward at 10 m/s you will reach the end of the tunnel just as the train is about to hit you what is the speed of the train ​

Answer 1

Answer:

50 m/s by relative motion