Ben saved $75 over the summer from his part-time job. He withdrew 40% of the money to buy new clothes. The rest of the money he
2 answers:
You might be interested in
Answer:
The answer is 4 liters.
Step-by-step explanation:
We want a final 25% solution, which means that the solvent should constitute 25 percent of all the liters of solution.
Let us call the litres of 40% solution, so when they are added to the 12 litres of 20% solution, the total litres of the new solution are:
of these liters, 25% must be the solvent:
Now for the 40% solution, the liters of the solvent are , and for the 20% liter solution, the liters of solve are
liters. Thus the total liters
of the solvent are
Therefore