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