Multiple choice

Mixture of water and alcohol is 40 litres, in which water is 60% of alcohol. Find the quantity of water added in the mixture so that water becomes 20% more than the alcohol.

  1. 24L

  2. 15L

  3. 12L

  4. 20L

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let alcohol = A, water = W. Given W = 0.6A and W + A = 40. Solving: 1.6A = 40, so A = 25 litres, W = 15 litres. After adding x litres of water, new water = 15 + x. Given water is 20% more than alcohol: 15 + x = 1.2 x 25 = 30, so x = 15 litres. The key is understanding percentages and setting up the correct equation.