Description for Correct answer:
Let the total quantity of mixture = x litre

According to question,

\( \frac{4}{4+1}=\left[ \frac{x-32}{x} \right] \)

4x=5x-160

x = 160 Litrs

The quantity of milk in mixture = \( 160 \times \frac{3}{4} \)

= 120 Litre

The quantity of water in misture = \( 160 \times \frac{1}{4} \)

= 40 Litre

32 litre of mixture was taken out and replaced with the same quantity of milk.

Then, the quantity of milk in mixture = \( 120-32 \times \frac{3}{4}+32 \)

= 120-24+32 = 128 Litre

After 10 litres of mixture is again taken out from the vessel, the resultant quantity of water

in the mixture = \( 32-10 \times \frac{1}{5} = 32 - 2 = 30 litre \)