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.
What is the speed of the train ?
let speed of train be X m/s
=>X =55 km/hr
Speed of train=s1=x kmph
Relative speed =s=(s1-s2)=(x-5)kmph
length of train=d=125m=125/1000km
Ans:speed of the train is 50kmph
Speed of the train relative to man = 125/10 m/sec
=> 45 km/hr.
Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr
x - 5 = 45
x = 50 km/hr
speed of train = 50 km/hr
I believe the correct answer is 50km/hr, though I found it in a much more circuitous way than the people below.
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