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A milkman mixed some water with milk to gain 25% by selling the mixture at the cost price. The ratio of water and milk is respectively –

A. 5 : 4 B. 4 : 5 C. 1 : 5 D. 1 : 4 Answer: Option D
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Solution(By Apex Team)

Cost price of 1 litres of milk = Rs. 100 ∴ Mixture sold for Rs. 125 $=\Large\frac{125}{100}=\frac{5}{4}$ $\begin{aligned}&\text{∴ Quantity of mixture =}\frac{5}{4}\ \text{litres}\\ &\text{∴ Quantity of milk = 1 litre}\\ &\text{∴ Quantity of water = }\frac{5}{4}-1=\frac{1}{4}\text{litre}\\ &\text{∴ Required ratio =}\frac{1}{4}\ :\ 1=1\ :\ 4\end{aligned}$

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