In a mixture of 60 litres, the ratio (by volume) of milk and water is 2 : 1. If X litres of water is added in the mixture, the ratio of milk and water becomes 1 : 2, then what is the value of X?
Answer & explanation
Correct answer: option 4
Initial solution,
Milk : Water
2 : 1
After adding X liters water, Final solution,
Milk : Water
1 : 2
⇒ Making ratio of milk in both the solution same, we multiply final ratio with 2,
⇒ (1 : 2) x 2 = 2 : 4,
⇒ Difference between Final ratio of water and Initial ratio of water = 4 - 1 = 3 units,
⇒ Total quantity of initial solution = 60 liters,
⇒ (2 + 1) units = 60
⇒ 3 units = 60
⇒ 1 unit = 20 L,
⇒ Therefore, water added to to initial solution i;e; is = 3 x 20 = 60 liters.