SOLUTION: need help solving this problem please.
A tank contains 55 gallons of a 55% solution of antifreeze. How much solution needs to be drained out and replaced with pure antifreeze to
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Question 749685: need help solving this problem please.
A tank contains 55 gallons of a 55% solution of antifreeze. How much solution needs to be drained out and replaced with pure antifreeze to obtain a 70% solution?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
The key here is to realize that you start with
55 gallons and end up with 55 gallons
Let = gallons of solution to be drained
and replaced with pure antifreeze
= gallons of antifreeze removed
gallons of antifreeze
in original mixture
----------------------------
18.333 gallons of solution must be drained and
replaced with pure antifreeze
check:
OK
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