The distance between two points X and Y is 480 km. Train A starts from X and train B starts from Y and meet at the point W, which is 180 km away from Y. If, Train A starts two hour earlier than train B, then in what time (in hour) train B reaches point W? (Assume speeds of train A and train B are same )
1
7 hours
2
6 hours
3
4 hours
4
3 hours
5
8 hours