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Deplasandu-se cu viteza de 14,4km/h,un biciclist va parcurge disanta de 12km in?


Răspuns :

14,4km/h=4m/s; 12km=12000m; t=d/v=12000:4=3000s
14.4km.................................1h
12km...................................x=0.8333 = 50 min