Pure honey costs ₹300 per litre. A shopkeeper adds water to 10 litres of pure honey and sells the resulting syrup at ₹250 per litre. The quantity of water added by the shopkeeper is :

2 litres

The correct answer is Option (1) → 2 litres

The price of the final mixture is,

$\frac{Total\,Cost\,of\,honey}{Total\,volume\,of\,mixture}=Selling\,price$

$\frac{10×300}{10+x}=250$

$⇒250x=500$

$⇒x=2$