zamień na m/s: a.108km/h b.0,72km/s c.3,6km/min zamień na km/h: a.15m/s b15m/min

a.108km/h /3,6 = 30m/s b.0,72km/s *1000 = 720m/s c.3,6km/min *1000/60 = 60m/s zamień na km/h: a.15m/s *3,6 = 54km/h b15m/min =0,9km/h