Exams › IBPS PO › Quantitative Aptitude

80 litres of milk-water mixture has 20% water. How much water must be added to make water 50%?

1. 48L
2. 58L
3. 40L
4. 42L

Correct answer: 48L

Solution

Current water=80×0.20=16L. Let x=water added. (16+x)/(80+x)=1/2. 2(16+x)=80+x. 32+2x=80+x. x=48L.

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