Multiple choice

Two vessels of 48 liter and 42 liter are filled with mixtures of milk and water, the proportion in the two vessel being respectively 13 : 7 and 18 : 17. If the contents of the two vessel be mixed and 20 liter of water be added to the whole, what will be the proportion of milk and water in the resulting mixture?

  1. 12 : 13

  2. 8 : 15

  3. 5 : 13

  4. 12 : 5

  5. 7 : 16
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A Correct answer
Explanation

Calculate milk in each vessel: 48L at 13:7 ratio gives 31.2L milk; 42L at 18:35 ratio gives 21.6L milk. Total milk = 52.8L. Total water initially = 37.2L, which becomes 57.2L after adding 20L. Final ratio 52.8:57.2 simplifies to 12:13. Options B, C, D, and E don't match this calculation.

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