A mixture contains milk and water in the ratio 3:2. If 20 litres of milk is added, what is the new ratio?

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Accepted Answer

1. Let the initial quantity be $5x$. Then milk = $3x$ and water = $2x$.

2. After adding 20 L milk, milk = $3x+20$, water = $2x$.

3. Check option (a) $5:2$: set $\dfrac{3x+20}{2x}=\dfrac{5}{2}$. Solve: $2(3x+20)=5(2x)\Rightarrow6x+40=10x\Rightarrow x=10$, which is valid.

4. So the new ratio can be $5:2$. Choose **(a)**.

FINAL_ANSWER: a

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