SOLUTION: How many cm3 of a 90% alcohol by volume solution must be added to 1000cm3 of a solution that is 20% alcohol by volume to make a 45% alcohol by volume?

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Question 832200: How many cm3 of a 90% alcohol by volume solution must be added to 1000cm3 of a solution that is 20% alcohol by volume to make a 45% alcohol by volume?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
A typical example which this lesson will satisfy:

"Mixture: one material quantity unknown"
http://www.algebra.com/my/Two-Part-Mixture-with-one-material-quantity-unknown.lesson?content_action=show_dev