How many liters of pure alcohol must be added to a 100-liter solution that is 20 percent alcohol in order to produce a solution that is 30 percent alcohol? Select:	A) 100/7	B) 5	C) 20/3	D) 8	E) 39/4
20% Alcohol solution means; in the 100 liter solution, 20 liters of solution is alcohol and 80 liters other solvents.   If we addxliters of alcohol to the solution, the solution becomes100+xliters and alcohol, which was 20 liters, becomes 20+x liters.   100/7ccording to the statement;   20+x = 30% of (100+x)   OR   20+x=(100+x)3/10   200+10x=300+3x   7x=100   x=100/7   100/7ns:100/7
<result>A</result>
How many liters of pure alcohol must be added to a 100-liter solution that is 20 percent alcohol in order to produce a solution that is 30 percent alcohol?