2420.21 – Horses and Oats
A farmer is going to the state fair to enter his horses in the long face competition. How much food should he take? Nine bags of oats feed his horses for days. He is taking horses to the contest for a total of days. Will bags of oats be enough?
Since bags last horses days, bags will last 8 horses as long, that is for days. By the same kind of thinking, 6 bags will last 5 horses 8/5 times longer, that is, for days (roughly a week).
More than enough! So bags of oats will be sufficient. He could get by with fewer bags. (Ha, but how many fewer?)