Final answer:
To convert the velocity from 55 m/s to km/h, multiply by 3.6, resulting in a velocity of 198 km/h.
Step-by-step explanation:
To convert the velocity of a train from meters per second (m/s) to kilometers per hour (km/h), we can use the conversion factor that 1 m/s is equivalent to 3.6 km/h.
So, if a train is traveling at 55 meters per second, we multiply this velocity by the conversion factor to find its speed in kilometers per hour.
V (km/h) = V (m/s) × 3.6
V (km/h) = 55 m/s × 3.6 = 198 km/h
Therefore, the velocity of the train in kilometers per hour is 198 km/h.