There are two machines M₁ and M₂. M₁ can produce 200 articles a day and it costs Rs. 10 to produce an article, whereas M₂ can produce 150 articles a day and it costs Rs. 8 to produce an article. If a man produces 250 articles in a day and sells each for Rs. 12, then what is the maximum profit percentage he can earn?

To maximize profit, he should use the cheaper machine first; producing 150 articles on machine M2 costs 150 multiplied by Rs. 8, which is Rs. 1200. He needs 100 more articles from machine M1, costing 100 multiplied by Rs. 10, making the additional cost Rs. 1000. The total cost is 1200 plus 1000 at Rs. 2200, while the total revenue from 250 articles at Rs. 12 each is Rs. 3000. Using the profit percentage formula, (800 divided by 2200) multiplied by 100 gives a maximum profit of 36.36%. The correct option is A.

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