A boy while running crosses a standing train of 150 metres in 30 seconds. Find the speed of the train if it crosses the running boy after sometime in 15 seconds running in the same direction.
1
54 km/hr
2
36 km/hr
3
72 km/hr
4
108 km/hr
5
50 km/hr
A boy while running crosses a standing train of 150 metres in 30 seconds. Find the speed of the train if it crosses the running boy after sometime in 15 seconds running in the same direction.