Question 123078: 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 checkley71(8403) (Show Source):
You can put this solution on YOUR website! .6(20-X)=.5*20
X=3.33 QT NEEDS TO BE DRAINED & REPLACED WITH PURE WATER.