Question

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? ​

Answer 1

Answer:

35L in 4:1 ratio

ie: milk = 28L and water = 7L

when 7 L water is added, the ratio becomes 28:14

ie: milk:water = 2:1

To change back this ratio back to the initial ratio 4:1

2x milk is added

ie: 28L of milk. (28+28):14 = 4:1

so 28L additional milk is needed.