A 60-litre mixture contains only water and oil in the ratio 5:1, respectively. If 36 litres of the mixture is replaced with the same quantity of oil, then find the quantity of oil in the final mixture.
Amount of oil in the mixture = 60 × (1/6) = 10 litres Amount of oil withdrawn = 36 × (1/6) = 6 litres Quantity of oil in the final mixture = 10 – 6 + 36 = 40 litres
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