bonjour
1/
6h15 -5h45 = 0h30 = 0.5 h
vitesse = distance / temps = 17/0.5 = 34
34km/h
2/
temps = distance / vitesse
temps = 17/20 =0.85
0.85 h =0.85x60 = 51 mn
6h +0h51 = 6h51 mn
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bonjour
1/
6h15 -5h45 = 0h30 = 0.5 h
vitesse = distance / temps = 17/0.5 = 34
34km/h
2/
temps = distance / vitesse
temps = 17/20 =0.85
0.85 h =0.85x60 = 51 mn
6h +0h51 = 6h51 mn