Multiple choice

A mixture contains milk and water in the ratio of 4 : 3. If 10 litres of water is added to the mixture, the ratio becomes 4 : 5. Find the quantity of milk in the given mixture.

  1. 10 litres

  2. 15 litres

  3. 20 litres

  4. 25 litres

  5. None of these
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C Correct answer
AI explanation

Let the initial quantities of milk and water be 4x and 3x respectively. Adding 10 litres of water makes the ratio 4x to (3x + 10), which equals 4 : 5. Solving the equation 4 times (3x + 10) = 5 times 4x yields 12x + 40 = 20x, so x equals 5. The quantity of milk is 4x, which is 4 times 5 = 20 litres.

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