A sells his articles at 15% profit. If he sells the article at ₹ 100 more than before, then he earns 20% profit. Find selling price of the article to gain 25% profit.

₹2000 ₹2500 ₹2800 ₹3000

₹2500

CP × 20% - CP × 15% = 100                           CP = 2000                           SP = 2000 × \(\frac{125}{100}\) = 2500