A goods train 210 m long passes a signal pole in 14 seconds. What is its speed in km/h?

Explanation

1. 01

   To pass a pole the train covers its own length, 210 m.

2. 02

   Speed $= \frac{210}{14} = 15$ m/s.

3. 03

   $15 \times \frac{18}{5} = 54$ km/h.