Question
From a container, 6 liters Solution “A” was drawn out and was replaced by water. Again 6 liters of the mixture was drawn out and was replaced by the water. Thus the quantity of Solution “A” and water in the container after these two operations is 9:16. The quantity of the mixture is:
Solution
Answer – D.15L
Quantity of solution “A” = x(1-6/x)²
Solution “A” : Water = 9 : 16
Solution “A” : Solution “A” + water = 9:25
x(1-6/x)²/x = 9/25
x = 15L
Answer – D.15L
Quantity of solution “A” = x(1-6/x)²
Solution “A” : Water = 9 : 16
Solution “A” : Solution “A” + water = 9:25
x(1-6/x)²/x = 9/25
x = 15L