SOLUTION: how much water should be added to 60 litres of milk containing 20% cream in order to get milk containing 15% cream

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Question 818746: how much water should be added to 60 litres of milk containing 20% cream in order to get milk containing 15% cream

Found 2 solutions by TimothyLamb, mananth:
Answer by TimothyLamb(4379) (Show Source):
You can put this solution on YOUR website!
60(0.20) + V(0.00) = (V + 60)(0.15)
12 = (0.15)V + 9
(0.15)V = 3
V = 3/(0.15)
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V = 20 liters
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Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website!
--- percent ---------------- Amount
milk 20 ---------------- 60 liters
water 0 ---------------- x liters
Mixture 15 ---------------- 60 + x liters

20 * 60 + 0 x = 15 ( 60 + x )
1200 + 0 x = 900 + 15 x
0 x -15 x = -1200 + 900
-15 x = -300
/ -15
x = 20 liters water

m.ananth@hotmail.ca