• # question_answer In 30 litres mixture of milk and water, the ratio of milk and water is 7 : 3. Find the quantity of water to be added in the mixture in order to make this ratio 3: 7. A)  30 litresB)  40 litres C)  20 litresD)  10 litres

[b] In 30L mixture ratio of milk and water = 7 : 3 $\therefore \,$ Milk = 21L, Water = 9L Let added water = xL $\therefore$ $\frac{21}{9+x}=\frac{3}{7}$ 27 + 3x = 147 3x = 120 x = 40 $\therefore \,$ 40L water added