Question

A 250 m long train is running at a speed of 55 km/hr. In how much time will it cross a platform of length 520 m

Answer 1

I doesn't know the exact answer but I have method The train is running at a speed of 42kmph. So the distance covered by train in meters per second is:

42*(5/18)=35/3 m/sec

Now the time required to the train to cross a man of is the same amount of time that train will take to cross itself that is 280 m.

So 280*(3/35) = 24 seconds.

Simply awesome!!