A reduction of 25% in the price of oil enables a house wife to obtain 5kgs more for Rs.800, what is the reduced price for kg? Answers.
A) 40 B) 60 C) 70 D) 80 E) 20

Rationale: "a 800 * ( 25 / 100 ) = 200 - - - - 5 ? - - - - 1 = > rs . 40"
Answer: A