Question

20 litres of a mixture contains milk and water in the ratio of 3:1.How much milk must be added to this mixture so as to have milk and water in the ratio 4:1?

Answer 1

first of all u divide 20 in the ratio 3:1
so u find 15 and 5 ok
here quantity of milk is 15 ltr
and water is 5 ltr
now the question is milk is 4times of water that is 4:1
means 5×4= 20
the quantity of water should be added= 20-15=5ltr

Answer 2

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.