Subject
Quantitative Aptitude
Topic
Speed & Distance
A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:
A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:
ক)
45 km/hrখ)
50 km/hrগ)
54 km/hrঘ)
55 km/hrExplanation
Speed of the train relative to man = (125/10) m/sec =(25/2) m/sec. = (25/2) x (18/5)km/hr = 45 km/hr. Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr. So, x - 5 = 45 => x = 50 km/hr.Related questions
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