Question

In a mixture of 30 litres, the ratio of milk to water 2 : 1. The amount of water to be further added to the mixture so as to make the ratio of the milk to water 1 : 2 will be ?

• A. 45 litres
• B. 60 litres
• C. 30 litres
• D. 40 litres

Answer 1

Answer: (C)

30 litres

Quantity of milk = (30 x $\frac{2}{3})$ liters = 20 liters

Quantity of water in it = (30 - 20) liters = 10 liters

New ratio = 1 : 2

Let quantity of water to be added further be x liters.

Then, milk : water = $\frac{20}{10+x}$

Now, $\frac{20}{10+x}=\frac{1}{2}$

So, 40 = 10 + $x$

$x=30$

Quantity of water to be added = 30 liters