Multiple choice

50 liters of mixture of milk and water contains 10% of water. The water to be added to make the water content 20% in the new mixture is?

  1. 4.5 litre

  2. 6 litre

  3. 5.5 litre

  4. 6.25 litre
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Initial water = 10% of 50 L = 5 L. Milk = 45 L. Let x liters of water be added. New total = 50 + x liters. New water = 5 + x liters. For 20% water: (5 + x) / (50 + x) = 20/100 = 1/5. 25 + 5x = 50 + x. 4x = 25. x = 6.25 liters.

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