DRDO Multi tasking staff Model paper 3

For the amount of milk present in 28 liters,
Amount of milk =(3∕4)×28=21 liters
Amount of water =28−21=7 liters
Total amount of milk in the new mixture =21+8=29 liters
Total amount of water in mixture =7+4=11 liters
∴ Ratio of milk to water =29∕11