Multiple choice

In a 150-litre mixture of milk and water, the percentage of milk is 84%. How much water should be added so that the percentage of milk becomes 52.5%?

  1. 50 liter

  2. 60 liter

  3. 75 liter

  4. 90 liter

  5. 100 liter
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In 150 litres, milk = 84% of 150 = 126 litres. After adding x litres water, total = 150 + x litres. Milk stays 126 litres. New percentage: 126/(150 + x) = 52.5% = 0.525. Solving: 126 = 0.525(150 + x), x = 90 litres.

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