SOLUTION: A 16-liter radiator is filled with a solution of 40% antifreeze. How much should you drain from the radiator and replace with pure antifreeze to obtain a 60% antifreeze solution?

Question 279571: A 16-liter radiator is filled with a solution of 40% antifreeze. How much should you drain from the radiator and replace with pure antifreeze to obtain a 60% antifreeze solution?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A 16-liter radiator is filled with a solution of 40% antifreeze. How much should you drain from the radiator and replace with pure antifreeze to obtain a 60% antifreeze solution?
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Antifreeze = antifreeze
0.4*16 - 0.4x + x = 0.6*16
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Multiply thru by 10 to get:
4*16 - 4x + 10x = 6*16
6x = 2*16
x = 32/6
x = 5 1/3 liters is the amount to be drained out and replaced
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Cheers,
Stan H.

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