A reduction of 25% in the price of oil enables a house wife to obtain 5kgs more for Rs.900, what is the reduced price for kg?	Pick one
A) 45
B) 60
C) 70
D) 80
E) 20

Rationale: "a 900 * ( 25 / 100 ) = 225 - - - - 5 ? - - - - 1 = > rs . 45"
Answer: A