How many seconds will a 500 metre long train take to cross a man walking with speed of 3 km/hr in the direction of the moving train if speed of the train is 63 km/hr?
সমাধান
সঠিক উত্তর: Option B
Speed of the train relative to man = (63 - 3) km/hr
= 60 km/hr = 50/3 m/sec
Therefore Time taken to pass the man
=(50 x3 /50) sec= 30 sec.
