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:
Question
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:
Solution
To find the speed of the train, we can use the formula:
Speed = Distance / Time
Given that the train is 125 m long and it takes 10 seconds to pass the man, we can substitute these values into the formula:
Speed = 125 m / 10 s
To calculate the speed in km/hr, we need to convert the distance from meters to kilometers and the time from seconds to hours.
1 kilometer = 1000 meters 1 hour = 3600 seconds
So, the speed of the train is:
Speed = (125 m / 10 s) * (1 km / 1000 m) * (3600 s / 1 hr)
Simplifying the units, we get:
Speed = (125 * 1 * 3600) / (10 * 1000 * 1) km/hr
Speed = 45 km/hr
Therefore, the speed of the train is 45 km/hr.
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