Question 35

In a mixture 25 litres, the ratio of milk and water is 4:1. How many litres of milk must be added to make the ratio 16:1?

Solution

Total Mixute=25 liters

and ratio of milk to water =4:1

4x+x=25

5x=25

x=5

so 20 liters of milak and 5 liter of water

Now ratio=16:1

Let y liters of milk be added to the old mixture

$$\frac{20+y}{5}=\frac{16}{1}$$

20+y=80

y=60

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