Question

A vessel contained a certain amount of a solution of acid and water. When 2 litres of water was added to it, the new solution had 50% acid concentration. When 15 litres of acid was further added to this new solution, the final solution had 80% acid concentration. The ratio of water and acid in the original solution would have been:

• A. 5:3
• B. 3:5
• C. 7:8
• D. 4:5
• E. 2:3

Hint:

When solving mixture problems, focus on tracking the amount of the component of interest (here, aci(d) and the total volume at each step. This helps in forming clear equations.

Answer 1

Answer: (E)