Humsafar Express of length 200 meters is moving at a speed of 130 km/hr. In what time Humsafar Express will cross a man who is walking at 10 km/hr in the same direction?
Question
Humsafar Express of length 200 meters is moving at a speed of 130 km/hr. In what time Humsafar Express will cross a man who is walking at 10 km/hr in the same direction?
Time=Distance/Speed
In this problem, both the train and man are moving so we will find the relative speed of the train. They are moving in the same direction, so the relative speed = (speed of train - the speed of man)
Relative Speed = (130-10) = 120 km/hr
Relative Speed in m/s = 120*5/18 = 100/3 m/s
Distance covered to cross the man = length of the train (200 meters)
Time=Distance/Speed
Time=200/(100/3) = 600/100 = 6 seconds
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Humsafar Express of length 200 meters is moving at a speed of 130 km/hr. In what time Humsafar Express will cross a man who is walking at 10 km/hr in the same direction?
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