Multiple choice

Liquid X is thrice as heavy as water and liquid Y is 12 times as heavy as water. In what ratio should X and Y be mixed to make the mixture 4 times as heavy as water?

  1. 2 : 1

  2. 8 : 1

  3. 4 : 1

  4. 3 : 2

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Using the rule of alligation: X is 3, Y is 12, target is 4. (12-4) : (4-3) = 8 : 1.

AI explanation

Let the weight of water be the base unit, making the specific weights of liquid X and liquid Y equal to 3 and 12, respectively. The desired weight of the mixture is 4, so applying the rule of alligation gives the ratio of X to Y as (12 - 4) : (4 - 3). This simplifies to 8 : 1. The required ratio is 8 : 1.

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