Question

How many minutes does it take a train starting at rest to reach a velocity of 22.0 kmh-1 at an acceleration of 0.2ms-2?

Answer 1

1 hour = 3,600 seconds .
1 km = 1,000 meters

So 22 km/hr  = (22,000/3,600) = 6.111... meters/second

To reach that speed with acceleration of 0.2 m/s², it will take

               (6.111... m/s) / (0.2 m/s²)  =  (30 and 5/9) seconds

                                                             =  0.509 minute (rounded)