Question

In a mixture $60$ litres, the ratio of milk and water $2:1$. If this ratio is to be $1:2$, then the quantity of water to be further added is

• A. $30$
• B. $40$
• C. $50$
• D. $60$

Answer 1

The correct option is D $60$

Quantity of milk $=60\times \frac{2}{3}=40$ litres
Quantity of water $=60-40=20$ litres
As per question we need to add water to get quantity $2:1$
$⟹\frac{40}{20+x}=\frac{1}{2}$
$\Rightarrow 20+x=80$
$\Rightarrow x=60$ litres