1) (tu fais la regle de trois)60*1200/40=1800m 1 minute =1800m
60*1800/1=108000 1 heure =108000 m
2)2100*40/1200=70 2100 m = 70 sec
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1) (tu fais la regle de trois)60*1200/40=1800m 1 minute =1800m
60*1800/1=108000 1 heure =108000 m
2)2100*40/1200=70 2100 m = 70 sec