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A mixture containing 40% of ethanol is mixed with another mixture containing 60% ethanol in the ratio 1 : 1.4. Find the percentage of ethanol in the mixture formed.

A mixture containing 40% of ethanol is mixed with another mixture containing 60% ethanol in the ratio 1 : 1.4. Find the percentage of ethanol in the mixture formed. Correct Answer 52%

The mixture is mixed in a ratio 1 : 1.4. Let the quantities of mixtures mixed be 100 and 140 litres, respectively. The amount of ethanol in the mixture formed = 100 * 40 / 100 + 140 * 60 / 100 = 40 + 84 = 124 litres The percentage of ethanol in the mixture so formed = 124 / 240 * 100 = 51.66% ≈ 52%

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