Question 83

80 litre mixture of milk and water contains 10% milk. How much milk (in litres) must be added to make water percentage in the mixture as 80%?

Solution

Quantity of mixture = 80 litres

Quantity of milk = $$\frac{10}{100}\times80=8$$ litres

=> Quantity of water = $$80-8=72$$ litres

Let $$x$$ litres of water is added

According to ques,

=> $$\frac{80}{100}(x+80)=72$$

=> $$x+80=72\times\frac{5}{4}=90$$

=> $$x=90-80=10$$ litres

=> Ans - (C)

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