SOLUTION: A mechanic is working on a car with a 20-qt radiator containing a 60% antifreeze solution. How much of the solution should he drain and replace with pure water to get a solution th
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Question 831546: A mechanic is working on a car with a 20-qt radiator containing a 60% antifreeze solution. How much of the solution should he drain and replace with pure water to get a solution that is 50% antifreeze? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = quarts of solution that musty be drained
and replaced with pure water = quarts of pure antifreeze in the solution
that is drained from radiator = quarts of pure antifreeze originally
in the radiator
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3.333 quarts of the solution should he drained and replaced
with pure water to get a solution that is 50% antifreeze
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check answer: quarts of pure antifreeze is drained
There is quarts of pure antifreeze left
The concentration after the quarts of water is
poured in is: = 50% antifreeze
OK
