SOLUTION: a tank contains 60 gallons of 50% solution of glycerine and water. what volume of water must be added to the solution to reduce the glycerine concentration to 12%?

Question 567763: a tank contains 60 gallons of 50% solution of glycerine and water. what volume of water must be added to the solution to reduce the glycerine concentration to 12%?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
a tank contains 60 gallons of 50% solution of glycerine and water. what volume of water must be added to the solution to reduce the glycerine concentration to 12%?
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Equation:
glyc + glyc = glyc
0.50*60 + 0*x = 0.12(60+x)
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multiply thru by 100 to get:
50*60 = 12*60 + 12x
12x = 38*60
x = 38*5
x = 190 gallons (amt. of water to add)
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Cheers,
Stan H.
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