A man is running beside a railway track at a speed of 90% less than the speed of the train moving in the opposite direction. The train crosses the man in 45/4 seconds. If the man would have been running at a speed of 25% more than his original speed, how much time would the train have taken to cross him?
1
7 sec.
2
8 sec.
3
9 sec.
4
10 sec.
5
11 sec.