solve ..........easy
From the 50 liters milk ,5 liters of milk is taken out and after it 5 liters of the water is added to the rest amount of milk.Again 5 liters of mixture of milk is and water is drawn out and it was replaced by 5 liters of water. If the process is continued similarly for third time .the amount of milk left after the third replacement.
The answer is 36.45.
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1 solution
50*[1-5/50]^3