SOLUTION: How much solution must be drained from a full 35 litre mug of hot chocolate and replaced with pure chocolate syrup to increase the chocolate concentration from 10% to 45%?

Question 1010509: How much solution must be drained from a full 35 litre mug of hot chocolate and replaced with pure chocolate syrup to increase the chocolate concentration from 10% to 45%?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = litters of solution to be drained off
and replaced with pure chocolate
= litters of chocolate in solution drained off
litters of chocolate to begin with
-------------------------------------------

13.611 litters must be drained off and
replaced with pure chocolate
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