Gatimaan Express of length 240 meters is moving at a speed of 110 km/hr. In what time Gatimaan Express will cross a man who is running at 10 km/hr in the opposite direction of the train?
Question
Gatimaan Express of length 240 meters is moving at a speed of 110 km/hr. In what time Gatimaan Express will cross a man who is running at 10 km/hr in the opposite direction of the train?
Time =Distance/Speed
In this problem, both the train and man are in motion so we will find the relative speed of the train. They are moving in the opposite direction, so the relative speed = (speed of train + speed of man)
Relative Speed: (110+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 (240 meters)
Time = 240*3/100 = 36/5 = 7.2 s
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