how many liters of water must be evaporated from 50 liters of a 3 - percent sugar solution to get a 20 - percent solution ?
"how many liters of water must be evaporated from 50 liters of a 3 - percent sugar solution to get a 20 - percent solution ? 3 % of a 50 liter solution is 1.5 l . so you are trying to determine how many liters must a solution be for the 1.5 l to represent 20 % of the solution . set up an inequality and solve for x : 1.5 / x = 1 / 20 x = 30 since you need a 15 l solution , you must evaporate 45 of the original 50 l solution to get a 20 % solution . answer is a ."
subtract(50, multiply(divide(50, const_100), 20))