Word Problems

% Concentration

2011 June(69F) Math Question 23

2018 December(B05) Math Question 36

44. A barrel contains 25 liters of a solvent mixture that is 40% solvent and 60% water. Lee will add pure solvent to the barrel, without removing any of the mixture currently in the barrel, so that the new mixture will contain 50% solvent and 50% water. How many liters of pure solvent should Lee add to create this new mixture?

Percentages

2021 April(Z04) Math Question 44

2019 December(C03) Math Question 51

54. Bonkosi mixes 60 milliliters of Solution A with 40 milliliters of Solution X. Solution A has a 40% hydrochloric acid concentration; Solution X has an unknown hydrochloric acid concentration. When Bonkosi tests the resulting 100-milliliter solution, she finds that it has a 36% hydrochloric acid concentration. What is the hydrochloric acid concentration of Solution X ?

% ConcentrationWord ProblemsACT math questions

2011 June(69F) Math Question 23

2018 December(B05) Math Question 36