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Mixture: quantity of one component to add to reach a new ratio

This type of question, asked 5 times: 13 Sep 2025 S3, 14 Sep 2025 S2, 17 Sep 2025 S1, 17 Sep 2025 S2, 18 Sep 2025 S2. All 5 questions below, oldest first.

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  1. Question 1

    13 Sep 2025 S3

    18
    A 40 L solution has salt and water in 3:5 ratio. How much water should be added to make ratio 3:7?

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  2. Question 2

    14 Sep 2025 S2

    19
    A 25 L solution has sugar: water = 3:2. How much water to make sugar: water = 1:1?

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  3. Question 3

    17 Sep 2025 S1

    22
    A 30 L mixture contains milk and water in the ratio 3:2. How much milk must be added to make it 4:1?

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  4. Question 4

    17 Sep 2025 S2

    20
    In a 40 L solution, the ratio of acid to water is 5:3. How much water must be added to make it 1:1?

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  5. Question 5

    18 Sep 2025 S2

    19
    In a 30 L mixture, milk : water = 3 : 2. How much water must be added to make the ratio 1 : 1?

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