A milkman buys milk at Rs 25 per litre and adds $\frac{1}{4}$ of water to it and sells the mixture at Rs 26 per litre. His gain (in %) is?1). 252). 203). 304). 15

A milkman buys milk at Rs 25 per litre and adds $\frac{1}{4}$ of water

1.	A milkman buys milk at Rs 25 per litre and adds $\frac{1}{4}$ of water to it and sells the mixture at Rs 26 per litre. His gain (in %) is?1). 252). 203). 304). 15
Answer» is 20 is the CORRECT ANSWER?? am i RIGHT?