SOLUTION: A farmer has 100 gallons of 70% pure disinfectant. He wishes to mix it with disinfectant which is 90% pure to obtain 75% pure disinfectant. How much of the 90% disinfectant must
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Question 854742: A farmer has 100 gallons of 70% pure disinfectant. He wishes to mix it with disinfectant which is 90% pure to obtain 75% pure disinfectant. How much of the 90% disinfectant must he use?
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
This lesson tells everything necessary for that type of problem:
How much to add to a known quantity of known concentration
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