A dealer sells an article for Rs. 24 and gains as much percent as the cost price of the article. Find the cost price of the article.

Match the items on the right to the items on the left.

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Let the cost price be Rs a. It's given that he gains as much as the cost price of the article, thus, Gain% = a%

Since money cannot be negative so, negalecting -120, we get a=20. Thus, the cost price of the article is Rs 20