Question

A mixture of 40 litres of milk and water contains 10% water. how much water must be added to make 40% water in the new mixture?

Answer 1

20 liters water added in new mixture

Step-by-step explanation:

Let required quantity of water = x liters

Then ,

According to the questions,

$0.1\times 40 + x = 0.40\times ( x + 40 )$

$4 + x = 0.4 \times x + 16$

$0.6\times x = 12$

$x = \frac{12}{0.6}$

x= 20 liters

20 liters water added in new mixture