A person is walking at a speed of 5 km/hr along a railway track. If he is 200 m ahead of the train which is 150 m long and runs at a speed of 60 km/hr in same direction, then what is the time required to pass the person?

Given: Speed of the person = 5 km/hr, length of train = 100 m, speed of train = 60 km/hr
Speed of train relative to walking person = (60–5) = 55 km/hr
Convert km/hr into m/s
55 km/hr = 55 x(5/18) = 15.27 m/s
Distance to be covered by the train = 200 + 150 = 350 m
Therefore, time taken by the train to cross the person
= Distance over speed =350/15.27 = 22.92 sec