A certain amount of water was poured into a 300 litre container and the remaining portion of the container
was filled with milk. Then an amount of this solution was taken out from the container which was twice the
volume of water that was earlier poured into it, and water was poured to refill the container again. If the
resulting solution contains 72% milk, then the amount of water, in litres, that was initially poured into the
container was
