A 60 litre mixture of sugar and water contains sugar and water in the ratio 2:3. How many litres of the mixture should be replaced by sugar so that the ratio of sugar and water becomes 1:1?
Explanation: ধরি, mixture এর X পরিমাণকে sugar দ্বারা replace করতে হবে। অর্থাৎ \(\frac{\text{sugar}}{\text{water}} = \frac{\frac{2}{5}(60-x)+x}{\frac{3}{5}(60-x)} = \frac{1}{1}\) Or, \(120+3x=180-3x\). Or, \(6x=60\). Or, \(x=10\). সঠিক Answer (B).
