An increase of Rs 3 in the selling price of an article turn a loss of 15/2% into a gain of 15/2%.The cost price of the article is??	Choose one:
A) 10 rs
B) 20 rs
C) 25 rs
D) 30 rs
E) 40 rs
let cost price= x rs   and selling price = y rs   now condition (1)-   if we sell at y loss occurs 15/2%   so by formula   selling price ={(100-%loss)/100}* cost price   so put values   y={(100-15/2)/100}x   y=(185/200)*x   x*182/200 - y=0---------(1)   condition 2-   if we increase selling price by 3 we get profit by 15/2%   so by formula   selling price={(100+%profit)/100}*cost price   put values   y+3={(100+15/2)/100}*x   x*(215/200)-y=3 --------(2)   now on solving equation 1 and 2 we get   x= 20 rs   ANSWER:20 rs
<result>B</result>
An increase of Rs 3 in the selling price of an article turn a loss of 15/2% into a gain of 15/2%.The cost price of the article is??