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Railways PYQCBT 1 2016

RRB NTPC · Question 35

In a mixture of 25 liters, the ratio of milk and water is 4 : 1. How many liters of milk must be added to make the ratio 16 : 1? A. 21 B. 25 C. 60 D. 36

  1. A

  2. D

  3. B

  4. C

Show answer & explanation

Answer: (D) C

Explanation

The mixture has 20 litres of milk and 5 of water. For a ratio of 16 : 1 with 5 litres of water, milk must be 16 × 5 = 80 litres. So 80 − 20 = 60 litres of milk must be added.