SOLUTION: Cream is approximately 22% butterfat. How many gallons of cream must be mixed with milk testing at 2% butterfat to get 90 gallons of milk containing 4% butterfat?
possible answers
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Question 305750: Cream is approximately 22% butterfat. How many gallons of cream must be mixed with milk testing at 2% butterfat to get 90 gallons of milk containing 4% butterfat?
possible answers:
7 gallons
8 gallons
9 gallons
11 gallons
12 gallons
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Let 
represent the number of gallons of cream required. Then 
represents the amount of 2% milk you need to add to get a total of 90 gallons.
There are 
gallons of pure butterfat in the cream and )
gallons of pure butterfat in the 2% milk, and once you have 90 gallons of 4% milk you will have 90 times 0.04 = 3.6 gallons of pure butterfat.
So:
\ =\ 3.6)
Just solve for
John
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