Rowerzysta jechał z prędkością 10 m/ s . Ile kilometrów przejechał w ciągu 30 min ? 

1min = 60sc 30min = 1800sc 1800sc x 10 = 18000m 18,000m = 18km Przejedzie 18km  

V=10m/s t=30min 1min - 60s 30min - xs   x=(30min*60s):1min=1800s   t=30min=1800s V=s/t /*t Vt=s s=10m/s*1800s=18000m 1km - 1000m xkm - 18000m   x=(1km*18000m):1000m=18km   Odp. Rowerzysta przejechał 18km.