bonjour
exercice 27
3 600 m/h = 3 600 : 3 600 = 1 m/s
100 m/min = 100 : 60 = environ 1.66 m/s
36 km/h = 36 000 : 3 600 = 10 m/s
exercice 29
1 h 45 min = 1 h + 45/60 d'h = 1 + 0.93 env = 1.93 h environ
2 h 18 min = 2 + 18/60 = 2.3 h
15 min = 15/60 = 0.25 h
4 h 27 min = 4.45 h
36 min = 0.6 h
1 jour 7 h 51 min = 31 h 51 min = 31.85 h
