PYQ Vault
EbooksTutor

Water added to a mixture of known volume and strength: new percentage

The same question, asked 2 times: 25 Jul 2023 S4*, 22 Sep 2025 S3. Every wording below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    25 Jul 2023 S4

    68
    A 40-litre mixture contains 25%25\% alcohol and 75%75\% water. If 10 litres of water are added to the mixture, the percentage of alcohol in the new mixture is:

    Tap an option to check your answer.

  2. Question 2

    22 Sep 2025 S3

    62
    A mixture contains 60%60\% milk. If 2020 liters of water is added to the 8080-liter mixture, what is the new percentage of milk?

    Tap an option to check your answer.