Zamiana jednostek 4km/h=...m/s 200m/s=...km/h

4km/h=1.11m/s 200m/s=720km/h

4km/h = 4 * 1000/3600m/s = 4 * 10/36m/s = 10/9m/s = 1,(1)m/s 200m/s = 200 * 1/1000 / 1/3600 km/h =  = 200 * 1/1000 * 3600 km/h =  = 1/5 * 3600 km/h =  = 720 km/h