Question 346723
How many liters of water must be added to 30liters of a 20% alcohol solution to dilute it to a 15% solution?
.
Let x = liters of water to add
then
"amt of alcohol at start" = "amt of alcohol at end"
.20(30) = .15(30+x)
6 = 4.5+.15x
1.5 = .15x
1.5/.15 = x
10 liters = x