A 30 L mixture contains milk and water in the ratio 3:2. How much milk must be added to make it 4:1?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 30 L.
Given: Total mixture = 30 L
Milk : Water = 3 : 2
So, Milk = 3/5 × 30 = 18 L
Water = 2/5 × 30 = 12 L
Let x L milk be added
New milk = 18 + x
Water remains = 12
New ratio = 4 : 1
(18 + x) / 12 = 1/4
18 + x = 48 ⇒ x = 30
Hence, 30 litres of milk must be added.