A man walking at 5 km hour noticed that a 225 m long train coming in the opposite direction crossed ...........

Quantitative Aptitude (CDS) Time & distance

A man walking at 5 km/hour noticed that a 225 m long train coming in the opposite direction crossed him in 9 seconds. The speed of the train is

75 km/hour

80 km/hour

85 km/hour

90 km/hour

छोटे Courses बड़े Results

Master Time & distance

Prepare through Micro-courses

Try Now

Explanation:

Let the speed of train = x km/hr
Distance of train = 225 m = 225 / 1000 km
Time taken = 9 sec = 9/3600 hr
Speed of man = 5 km/hr
Relative speed = Speed of train + speed of man = (x + 5) km/hr
But relative speed = (225/1000) X (3600/9) = 90 km/hr
x + 5 = 90
x = 85 km/hr