Răspunsuri

2014-02-21T12:15:29+02:00
1 km=1000m

1 ora=3600 s


72km/h?m/s.=72*1000/3600=72*10/36=20m/s

54km/h?m/s.=54*1000/3600=54*10/36=15m/s


dar se stie ca
1 m/s = 60 m/min = 3600 m/h = 3.6 km/h

20m/s?km/h =  3.6*20=72km/h
15m/s?km/h = 15*3.6=54 km/h