A jar full of whisky contains 40% alcohol. A part of this whisky is replaced by another containing 19% alcohol and now the percentage of alcohol was found to be 26%. The quantity of whisky replaced is:
Explanation:
Let the initial quantity of 40% alcohol be V liters out of which r liters was taken out.
Quantity of 40% alcohol remaining = (V – r) and quantity of 19% alcohol = r.
By the rule of alligation, we have:
So, ratio of 1st and 2nd quantities = 7 : 14 = 1 : 2
⇒ (V-r)/r = 1/2
⇒ r/V = 2/3
∴ Required quantity replaced = 2/3
Hence, option (b).
» Your doubt will be displayed only after approval.
Help us build a Free and Comprehensive Preparation portal for various competitive exams by providing us your valuable feedback about Apti4All and how it can be improved.