engineering recuitment UPCL AE (E&M) 2021 Mock Test Quantitative Aptitude Mixture Problems To Make a Mixture from Two or More Things
A chemist has 25 ml of a solution of acid and water that contains 20% concentration of acid. What amount of pure acid (in millilitres) is to be added to the solution, to increase the concentration of 75%?
1
35
2
45
3
55
4
50