Multiple choice

The ratio of the quantities of an acid and water in a mixture is (1 : 3). If 5 liters of acid is further added to the mixture, the new ratio becomes (1 : 2). The quantity of new mixture (in liters) is

  1. 32

  2. 40

  3. 42

  4. 45
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Initial quantities: acid = x, water = 3x. After adding 5L acid: (x + 5)/(3x) = 1/2. Solving: 2x + 10 = 3x, x = 10. New mixture: acid = 15L, water = 30L, total = 45L. Option A gives 32L, B gives 40L, C gives 42L - none satisfy the ratio condition.

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