Question

A 60 L mixture has a milk-water ratio of 7:3. How much water to add to make the ratio 1:1 ?

• A. 18 L
• B. 20 L
• C. 22 L
• D. 24 L

Answer 1

Answer:

D. 24 L

Total mixture = 60 L

Milk : Water = 7 : 3

So,

• Milk $(= \frac{7}{10} \times 60 = 42) L$

• Water $(= \frac{3}{10} \times 60 = 18) L$

To make the ratio (1:1), water must equal milk.

Required water = 42 L

Already present = 18 L

Water to be added:

$42 - 18 = 24 \text{ L}$

So, 24 L of water must be added.