SOLUTION: An automobile radar contains 12L of a mixture of water and antifreeze. The mixture is now 20% antifreeze. How much of the mixture must be drawn off and replaced by pure antifreeze

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Question 1048924: An automobile radar contains 12L of a mixture of water and antifreeze. The mixture is now 20% antifreeze. How much of the mixture must be drawn off and replaced by pure antifreeze to get a mixture containing 30% antifreeze?
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617)   (Show Source): You can put this solution on YOUR website!
"radar" is something else. "Radiator" is the word you want.

Radiator drain & replace problem, lesson

Answer by ikleyn(52786)   (Show Source): You can put this solution on YOUR website!
.
An automobile radiator contains 12L of a mixture of water and antifreeze. The mixture is now 20% antifreeze.
How much of the mixture must be drained off and replaced by pure antifreeze to get a mixture containing 30% antifreeze?
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Similar problem was solved for you in the lesson
    - Word problems on mixtures for antifreeze solutions
in this site.

There is entire bunch of the lessons covering various types of mixture problems
    - Mixture problems
    - More Mixture problems
    - Solving typical word problems on mixtures for solutions
    - Word problems on mixtures for antifreeze solutions
    - Word problems on mixtures for dry substances like coffee beans, nuts, cashew and peanuts
    - Word problems on mixtures for dry substances like candies, dried fruits
    - Word problems on mixtures for dry substances like soil and sand
    - Word problems on mixtures for alloys
    - Typical word problems on mixtures from the archive
    - OVERVIEW of lessons on word problems for mixtures
in this site.

Read them and become an expert in solution the mixture word problems.

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

It contains many other solved word problems, as well as many other interesting and useful things.


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