If 4% more is gained by selling an article for Rs. 350 than by selling it for Rs. 340, the cost of the article is	Choices:
A) 250  B) 231  C) 200  D) 288  E) 111

Rationale: "explanation : let c . p . be rs . x . then , 4 % of x = 350 - 340 = 10 x / 25 = 10 = > x = 250 answer : a"
Answer: A