Exams › IBPS PO › Quantitative Aptitude

In a 180 mL mixture of milk and water, water is 40% of the mixture. How much water should be added so that water becomes 60% of the mixture?

1. 70 mL
2. 65 mL
3. 80 mL
4. 100 mL

Correct answer: 100 mL

Solution

Initially, water is 40% of 180 mL, so water = 72 mL and milk = 108 mL. If x mL water is added, then water becomes 72 + x and total mixture becomes 180 + x. Setting \((72+x)/(180+x)=60\%\) gives x = 100 mL.

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