SOLUTION: The food you buy for your 15-horse herd lasts for 10 days. If you get 5 more horses, how long will that same amount of food last? (assume each horse eat about the same amount, I k

Question 812706: The food you buy for your 15-horse herd lasts for 10 days. If you get 5 more horses, how long will that same amount of food last? (assume each horse eat about the same amount, I know this isn't true, but it's a good approximation given we don�t have any other information about the herd)
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the 10 day supply of food for 15 horses
= the amount of food per horse for 10 days
-------------
horses now
Now the same amount of food means
is the amount of food per horse
-------------
Let = number of days the same
amount of food lasts
Now I can set up the ratio:

------------------------

The same amount of food lasts 7.5 days

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