In a solution of water and milk, the quantity of milk is double the quantity of water. To pass the quality standards, the solution must contain 90% milk in it. If the volume of solution is v, then how much pure milk in litre is to be added to the solution to pass the quality standard.
Show answer & explanation
Correct answer: D
Explanation
Correct answer is option 4 i.e. V.
Given:
The quantity of milk is double the quantity of water in the mixture.
Calculations:
Let the total volume of the solution v be 15 liter
Quantity of milk (initially) = 2/3 × 15 = 10 liter
Amount of milk (x) to be added to make the ratio 9 : 1
⇒ (10 + x)/5 = 9/1
⇒ 10 + x = 45
⇒ x = 35
Required volume = (35/15)v = 7/3v