SOLUTION: solution A is 20% alcohol and solution B is 70% alcohol. How much of each is needed to make 50 liters of a solution that is 60% alcohol? Jean can stack a pile of wood in 2 ho

Algebra ->  Expressions-with-variables -> SOLUTION: solution A is 20% alcohol and solution B is 70% alcohol. How much of each is needed to make 50 liters of a solution that is 60% alcohol? Jean can stack a pile of wood in 2 ho      Log On


   

Question 1072106: solution A is 20% alcohol and solution B is 70% alcohol. How much of each is needed to make 50 liters of a solution that is 60% alcohol?

Jean can stack a pile of wood in 2 hours and sandy can stack the same pile in 4 hours. How long will it take them to stack the wood if they worked together?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
60% Alcohol Solution
x, amount of the 20%
-
%2820x%2B70%2850-x%29%29%2F50=60
Solve for x and evaluate 50-x.



Stacking Wood
%281%2F2%2B1%2F4%29
2%2F4%2B1%2F4
3%2F4
TIME working together, 4%2F3
or 1 hour 20 minutes