A man sold an article for ₹ 396 and gained 10% on it. Find the cost price of the article.

Given: S.P. = ₹ 396 Profit = 10% Let the C.P. of the article be ₹ x. As we know, Profit % = ⇒ 10 = ⇒ Profit = ⇒ Profit = ⇒ Profit = And, Profit = S.P. \- C.P. ⇒ = 396 - x ⇒ = 396 Since L.C.M. of 10 and 1 = 10, multiply each term with 10 to get: ⇒ = 396 10 ⇒ 1x + 10x = 3960 ⇒ 11x = 3960 ⇒ x = ⇒ x = 360 Hence, cost price of the article is ₹ 360.