A 180 m long train crosses a man standing on the platform in 6 seconds. What is the speed of the train?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 108 km/h
To pass a man standing on the platform, the train has to cover only its own length, because the man takes up almost no length.
Speed \(=\displaystyle\frac{180\ \mathrm{m}}{6\ \mathrm{s}}=30\) m/s
In km/h: \(\displaystyle30\times\frac{18}{5}=108\) km/h (1 m/s = 3.6 km/h)