Sagot :
Réponse :
bonjour
vitesse=9 x 60 minutes/20=27km/h
m/s=27x1000/3600 secondes=7.5m/s
Bonjour,
20 mn -> 9km
1mn -> 9/20
60mn -> (9*60)/20 =>27km/h
27 km = 27 000 m
1h = 3 600 s
27 000/ 3600 =>7,5m/s
Réponse :
bonjour
vitesse=9 x 60 minutes/20=27km/h
m/s=27x1000/3600 secondes=7.5m/s
Bonjour,
20 mn -> 9km
1mn -> 9/20
60mn -> (9*60)/20 =>27km/h
27 km = 27 000 m
1h = 3 600 s
27 000/ 3600 =>7,5m/s