A shopkeeper allows 10% discount on goods when he sells without credit. Cost price of his goods is 80% of his selling price. If he sells his goods by cash, then what is his profit percent? एक दुकानदार जब अपने सामान को उधार नहीं बेचता है तो उस पर 10% की छूट देता है। उसके सामान का लागत मूल्य उसके बिक्री मूल्य का 80% है। यदि वह अपने सामान को नकद बेचता है, तो उसका लाभ कितने प्रतिशत है?

Let SP (without discount) = 100. With 10% discount, selling price = 90. CP = 80% of selling price = 0.8 × 90 = 72. Profit = SP - CP = 90 - 72 = 18. Profit percent = (18/72) × 100 = 25%. When selling in cash (without discount), SP = 100, CP = 72, profit = 28, profit% = 28/72 × 100 ≈ 38.9%. But the question asks for the selling scenario described, where 10% discount is given, so answer is 25%.