Multiple choice

In a 60 lit mixture, the ratio of milk and water is 3 : 7. How much water must be added to the mixture in order to make the ratio 2 : 5?

  1. 2 lit.

  2. 3 lit.

  3. 5 lit.

  4. 2.5 lit.

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

Initial mixture: 60L with milk:water = 3:7. Milk = (3/10) × 60 = 18L, Water = (7/10) × 60 = 42L. Let x liters of water be added. New ratio: 18/(42+x) = 2/5. Cross-multiplying: 90 = 84 + 2x, so 2x = 6 and x = 3L. Verification: 18/(42+3) = 18/45 = 2/5.

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