[Jail Warder S-2 2021 ]

1. In a mixture of 35 L, the ratio of milk to water is 4:1. If 7 L water is added to the mixture, the ratio of milk to water changes to a new ratio. If we want ratio of milk and water to change back to the original value, how much milk is to be added now?

1. 32 L

2. 21 L

3. 35 L

4. 28 L

Correct Answer :

28 L