Vessel contains mixture of milk and water in ratio 22:3 and 20 litre o...
Problem: A vessel contains a mixture of milk and water in the ratio 22:3. 20 litres of the mixture is taken out and replaced with 16 litres of pure milk. As a result, water becomes 11 1/9% of the resulting mixture. If the vessel is filled to 88% initially, find the total capacity of the vessel.
Solution:
Let the initial capacity of the vessel be x litres.
Initially, the vessel is filled to 88%, so the quantity of mixture in the vessel = 0.88x litres.
Given, the ratio of milk and water in the mixture = 22:3
So, let the quantity of milk = 22y and the quantity of water = 3y.
Hence, the quantity of mixture = 22y + 3y = 25y.
Therefore, the percentage of milk in the mixture = (22y / 25y) × 100% = 88%.
And, the percentage of water in the mixture = (3y / 25y) × 100% = 12%.
Now, 20 litres of the mixture is taken out and replaced with 16 litres of pure milk.
Let the final quantity of water in the mixture be z litres.
So, the quantity of milk in the mixture will remain the same, i.e. 22y litres.
The quantity of mixture left in the vessel after taking out 20 litres = (0.88x - 20) litres.
So, the quantity of water in the mixture left in the vessel = 0.12(0.88x - 20) = 0.1056x - 2.4 litres.
The quantity of water added to the mixture = (z - 3y) litres
And, the quantity of milk added to the mixture = 16 litres.
After the replacement, the ratio of milk and water in the mixture = (22y + 16) : (z - 3y)
Given, water becomes 11 1/9% of the resulting mixture.
So, the percentage of water in the mixture after the replacement = 11 1/9% = (1/9) × 100/1% + 11% = 100/9 + 11% = 200/9%
Therefore, we get the following equation:
(200/9) = [(z - 3y) / (22y + 16 + z - 3y)] × 100%
On simplifying, we get:
z = (297/20)y + 80
Now, the quantity of water added to the mixture = (z - 3y) litres
So, (z - 3y) litres = (297/20)y + 80 - 3y litres = (197y/20) + 80 litres.
On equating the above equation with the quantity of water added, we get:
(197y/20) + 80 = (0.1056x - 2.4) litres
On simplifying, we get:
y = (1/25)(0.1056x - 245)
Also, from the initial mixture, we get:
(22y + 3y) litres = 0.88x litres
On substituting the value of y, we get:
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