By selling an article for Rs. 144, a man gained such that the percentage gain equal the cost price. The C.P. of the article is?
Correct Answer: Rs. 80
Explanation:
Let the cost price of article be P.
So from question,
Selling price = P + P%
⇒ 144 = P + (P x P)/100
⇒ 144 x 100 = 100P + P2
⇒ P2 + 100P - 14400 = 0
⇒ (P - 80)(P +180) = 0
∴ P = 80
