Question

20 litres from a vessel completely filled with milk is replaced by water and then again 20 litres of the new mixture is replaced by water. If 18 litres of milk is left now in the vessel, what was the capacity of the vessel?

Answer 1

Step-by-step explanation:

Initial conc. Of milk and water be

m and w respectively.

Initially, m+w=42 ;

Later 6L of mixture was removed then conc. Of milk and water become 6m/7 and 6w/7 respectively.

And 6L of pure water is added.

The conc. of

Milk is 6m/7;

Water is 6w/7 +6;

and 6m/7 +(6w/7 +6)=42;

Given that new conc. Of milk is 30%.

i.e. (6m/7)/42=30/100;

Solving above eqn ,we get m=14.7 L

Answer 2

Answer:

It is the capacity of the vessel in a new mixture that replaced bt the 18 litre water.