Effective cost price of 100 rolls of paper = (100 × 29) + 250 + (100 × 0.2) = 2900 + 250 + 20 = Rs. 3170 Selling price at 30% profit = 1.30 × 3170 = Rs. 4121 Therefore, selling price of each roll of paper = 4121/100 = Rs. 41.21
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