Odpowiedź :
Odpowiedź:
metry na sekundę
18km/h = 18 ×1000m /60s= 18000m/60s = 300m/s
72km/h = 72000m/60s = 700m/s
km na godzinę
15m/s = 15/1000m ÷ 1/3600s= 15/1000 × 3600s = 54km/h
20m/s = 20/1000m ÷ 1/3600 = 20/1000× 3600s =72km/h
ponieważ
1000m=1km
1h=3600s