SSC Government Jobs Exams Numerical Ability Alligation or Mixture

Abhishek has a container filled completely with 80% milk and 205 water. 5 litres of the solution is removed and replaced with water. Then 15 litres of this solution is removed and replaced with water. the milk percent is now 55%. which of the following be the capacity of the container in litres?
20,40,50,80,none.

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Q. A container is filled with 80 litre milk, 10 litre milk is drawn out and 20 litre water is added then 20 litre mixture is drawn out and 30 litre water is added after this 30 litre mixture is drawn out and 40 litre water is added.
Find ratio of milk and water and final quantity of milk.