Multiple choice

In a mixture of 55 kg., the ratio of milk and water is 7:4. What is the quantity of water added to the mixture in order to make the ratio 7:6?

  1. 15 kg.

  2. 10 kg.

  3. 5 kg.

  4. 12 kg.

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

Initial: milk:water = 7:4, total 55 kg. Milk = (7/11)*55 = 35 kg, Water = 20 kg. Let x kg water added. New ratio 7:6 means milk:water = 7:6. So 35/(20+x) = 7/6, giving 210 = 140 + 7x, thus 7x = 70, x = 10 kg. Option B is correct.

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