SOLUTION: Rubbing alcohol is sold in two concentrations : 40% and 60%. If eight litres are mixed together, producing a 55% concentration, how many litres of each strength are used?
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Question 934126: Rubbing alcohol is sold in two concentrations : 40% and 60%. If eight litres are mixed together, producing a 55% concentration, how many litres of each strength are used?
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
This is the type of exercise corresponding to the lesson here:
http://www.algebra.com/my/Mixtures%3A-All-in-Symbols.lesson?content_action=show_dev
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