Subject Category > Mathematics

Q. In a 30 litre mixture of milk and water, the ratio of milk and water is 7:3. How much water should be added in the mixture so that the ratio of milk and water becomes 3:7?

A) 5

B) 12

C) 28

D) 40

✔ 40

Additional Information > Exam point of View

Initially, milk is 21 litres, and water is 9 litres. Let x litres of water be added. The equation becomes 21 / (9 + x) = 3 / 7. Solving this, x = 41 litres. Thus, 41 litres of water must be added.

Asked Question

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