A reduction of 20% in the price of salt enables a lady to obtain 10kgs more for Rs.300, find the original price per kg?	Choose the correct answer: A) s.7.7 B) s.7.4 C) s.7.5 D) s.7.1 E) s.7.9
100*(20/100)= 
<gadget id="calculator">100*(20/100)</gadget>
<output>20</output>
20 --- 10   ? --- 1=&gt; Rs.2   300 --- 80   ? --- 2 =&gt; Rs.7.5   Answer:s.7.5
<result>C</result>
A reduction of 20% in the price of salt enables a lady to obtain 10kgs more for Rs.300, find the original price per kg?