A reduction of 50% in the price of oil enables a house wife to obtain 5kgs more for Rs.800, what is the reduced price for kg?  Options.
A) s.42
B) s.46
C) s.40
D) s.80
E) s.34
800*(50/100)= 
<gadget id="calculator">800*(50/100)</gadget>
<output>400</output>
400 ---- 5   ? ---- 1=&gt; Rs.80   Answer: s.80
<result>D</result>
A reduction of 50% in the price of oil enables a house wife to obtain 5kgs more for Rs.800, what is the reduced price for kg?