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?  Choose the correct option.
A) s.40 B) s.46 C) s.49 D) s.45 E) s.42
900*(25/100)= 
<gadget id="calculator">900*(25/100)</gadget>
<output>225</output>
225 ---- 5   ? ---- 1=&gt; Rs.45   Answer: s.45
<result>D</result>
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?