Question 512341: how many liters of a35% solution of alcohol should be mixed with 30 liters of 55% solution to make up a 47% solution Answer by Maths68(1474) (Show Source):
You can put this solution on YOUR website! Soluton A
Amount = x
Concentration = 35%=0.35
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Solution B
Amount = 30 liters
Concentration = 55%=0.55
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Resultant Solution
Amount=30+x
Concentration=47%=0.47
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(Amount of A * Concentration of A)+(Amount of B * Concentration of B) = (Amount of Resultant * Concentration of Resultant)
(x*.35)+(30*0.55)=(30+x)*0.47
0.35x-0.47x=14.1-16.5
-0.12x=-2.4
-0.12x/-0.12=-2.4/-0.12
x=20
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20 liters of 35% solution of alcohol should be mixed with 30 liters of 55% solution to make up a 50 liters of 47% solution
