John has 25 horses. He feeds each horse twice a day and feeds them 20 pounds of food at each feeding. He buys half ton bags of food. How many of those will he have to buy in 60 days?
Thoughts? Step-by-step reasoning:
He feeds each horse 2 * 20 = 40 pounds of food a day. So he uses 40 * 25 = 1000 pounds of food a day. That means in 60 days he uses 60 * 1000 = 60000 pounds of food. Each bag of food is 2000 * .5 = 1000 pounds. So he needs to buy 60000 / 1000 = 60 bags of food.
Thus, the answer is 60.