Question
A train travels 45 m in 3 s. What is the speed of the train in km/h?
This question was previously asked in
RRB ALP 2018 CBT 2 Fitter Question Paper (21-Jan-2019) (Shift 3)
The correct answer is
54
Calculate Speed in Meters per Second (m/s)
First, find the speed of the train using the formula:
Speed = Distance / Time
Given:
- Distance = 45 m
- Time = 3 s
Speed in m/s = \(\frac{45 \text{ m}}{3 \text{ s}} = 15 \text{ m/s}\)
Convert Speed from m/s to km/h
To convert speed from meters per second (m/s) to kilometers per hour (km/h), multiply by \(\frac{18}{5}\) (which is equivalent to 3.6).
Speed (km/h) = Speed (m/s) \(\times \frac{18}{5}\)
Speed (km/h) = \(15 \times \frac{18}{5}\)
Speed (km/h) = \(3 \times 18 = 54 \text{ km/h}\)
Final Answer
The speed of the train is 54 km/h.
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