The train moved 25 meter / sec.
From nose to tail it takes 130 / 25 = 5.2 seconds.
The remaining 21 - 5.2 = 15.8 seconds is the width of the bridge
=> 395 meter
How many seconds will a 468 m long train take to cross a man driving his motor bike at a speed of 39 km/hr in a direction of the moving train if the speed of the train is 120 km/hr?
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 ?