Question

a mixture of 20 litres contains milk and water in the ratio 4:1. How many litre of the mixture be taken out and the same quantity of water added to it so that the ratio of milk and water becomes 3:2​

Answer 1

Answer:

5 litres

Step-by-step explanation:

In the mixture of 20 litres, ratio of milk to water is 3:1. So the actual quantities of milk and water can be calculated in the following way:

Let the amount of milk be 3x and water be x

3x + x = 20

4x = 20

x = 5

So, milk is 15 litres and water is 5 litres

Now keeping the same quantity of water and to change the ratio to 4:1, we need 5X4=20 litres of milk for every 5 litres of water.

So we add 20-15=5 litres of milk. now the ratio is 20:5 which is 4:1.