Zamień z km/h na m/s, lub odwrotnie. 8km/h= .............m/s 3m/s=................km/h Z obliczeniami! 

8km/h = 8000m/3600s = 80m/36s = 20m/9s = 2i2/9 m/s 3m/s = 3/1000km:1/3600s = 10,8km/h

1km=1000m 1h=3600s 8km/h= 8*1000m/3600s=2,(2)m/s 1m=0,001km 1s=1/3600s 3m/s=3*0,001km/1/3600s=10,8km/h   liczę na naj ;d