Mathematics, 17.01.2021 16:00, joynerjaila

1. Un coureur de demi-fond parcourt 850 m en 3 minutes 12 secondes. Calculer sa vitesse moyenne en m/s. Arrondir à l’unité.
2. Juliette est en voiture et roule à une vitesse moyenne de 120 km/h.
a. Quelle distance parcourt-elle en 4 h 12 min ?
b. Elle part de Givors à 16h12 et parcourt 319 km. A quelle heure arrive-t-elle ?
Donner le résultat en heure et en minutes

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1. Un coureur de demi-fond parcourt 850 m en 3 minutes 12 secondes. Calculer sa vitesse moyenne en...