A man sells an article at a profit of 25%. If he had bought it at 20% less and sold it for Rs.10.50 less, he would have gained 30%. Find the cost of the article.  Choose the correct choice from the following options
A) 30  B) 40  C) 50  D) 60  E) 70
Let 50.P=100   Gain=25%   S.P=125   Supposed 50.P=80   Gain=30%   S.P=(130*80)/100= 
<gadget id="calculator">(130*80)/100</gadget>
<output>104</output>
104   Diff=(125-104)= 
<gadget id="calculator">(125-104)</gadget>
<output>21</output>
21   Diff 21 when 50.P=100   then Diff 10.50 when 50.P=(100*10.50)/21= 
<gadget id="calculator">(100*10.50)/21</gadget>
<output>50</output>
50   ANSWER:50
<result>C</result>
A man sells an article at a profit of 25%. If he had bought it at 20% less and sold it for Rs.10.50 less, he would have gained 30%. Find the cost of the article.