Răspuns :
1 h si 20 min = 1,(3)ore =(13-1)/9=12/9=4/3 ore
350: 4/3= 350x3/4=262,5 km/h
262,5 km/h=262,5 km *1000 m/km /1 h x3600 s=262500/3600= 72,91(6) m/s
350: 4/3= 350x3/4=262,5 km/h
262,5 km/h=262,5 km *1000 m/km /1 h x3600 s=262500/3600= 72,91(6) m/s