A milkman mixes 20 L of water with 80 L of milk. After selling one-fourth of this
mixture, he adds water to replenish the quantity that he has sold. What is the
current proportion of water to milk?
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Answer:
Total quantity = 100 litres. the ratio of water to milk = 1:4
25% is sold.
remaining = 75 litres.
the quantity of water remaining = 75/5 = 15 litres.
quantity of milk remaining = 75*4/5 = 60 litres.
Now 25 liters of water is added.
so 40 liters of water and 60 liters of milk.
The ratio becomes 2:3
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