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Sagot :

Réponse:

exercice 6:

1_ t=d/v=87,5/17,5=5h

2_t=d/v=63/18=3,5h

exercice 7:

1_d=v×t=65×2,5=162,5km

2_24/60=0,4h

d=v×t=15×1,4=21km

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