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14 vaci consuma in 5 zile 840 kg hrana cat consuma 10 vaci in 5 zile

Răspuns :

840:14=60 kg (1 vaca)
60×10 =600 kg (10 vaci)
14 vaci........5zile.......840 kg  hrana
1 vaca ...........5 zile.....840:14= 60 kg hrana
10 vaci...........5 zile.........60*10=600 kg hrana