A person bought an article and sold it at a loss of 10%. If he had bought it for 20% less and sold it for Tk.55 more he would have had a profit of 40%. The CP of the article is--

প্রশ্নঃ A person bought an article and sold it at a loss of 10%. If he had bought it for 20% less and sold it for Tk.55 more he would have had a profit of 40%. The CP of the article is--