Halfway = 325 meter.
Any further and the horse is exiting the tunnel again.
time travelled=total distance/speed
A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds.
What is the speed of the train ?
Two trains each 333 meter long, are running in opposite directions on parallel tracks.
If their speeds are 45 km/hr and 66 km/hr respectively, then what is the time taken by the faster train to pass the driver of slower one?