A train 125m long passes a man, running at 50km/hr in the same direction in which the train is going, in 10 secs. The speed of the train is-
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9
Answer:
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 ? Explanation: Speed of the train relative to man = (125/10) m/sec = (25/2) m/sec.
Answered by
8
Answer:
50 kmph
Step-by-step explanation:
the train and the man is moving in same direction. So the relative speed = (speed of train-speed of man). Consider the train speed as x.
we know that,
Distance/Speed=Time
Length of train=125m
Speed of man=5 km/hr=5*5/18=25/18 m/s.
time=10s
now,
125/(x-25/18)=10
125*18=(18x-25)10
2250=180x-250
2500=180x
x=250/18
the ans is in km/hr. To convert m/s -> km/hr multiply the ans by 18/5
Therefore, (250/18)*(18/5)= 50 km/hr
Ans option B.
Hope you understand.please mari as brilliant
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