A reduction of 30% in the price of oil enables a house wife to obtain 3kgs more for Rs.700, what is the reduced price for kg? Pick one.
A) 70
B) 50
C) 60
D) 80
E) 65

Rationale: "700 * ( 30 / 100 ) = 210 - - - - 3 ? - - - - 1 = > rs . 70 answer : a"
Answer: A