Réponse :
Détaillons les calculs.
72 km/h = 72 000 m/h = 72 000 / 60 m/min = 1 200 m/min = 1 200 / 60 m/s = 20 m/s
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Réponse :
Détaillons les calculs.
72 km/h = 72 000 m/h = 72 000 / 60 m/min = 1 200 m/min = 1 200 / 60 m/s = 20 m/s