Question 1119804
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The cow eats the same amount as the goat in 1/3 as many days, so the cow is equivalent to 3 goats.  Then the goat and the cow together are equivalent to 4 goats.<br>
So, with the goat and the cow, the 225 kg of hay will last 1/4 as long.<br>
45/4 = 11 1/4 days.