A man bought an article and sold it at a gain of 10%. If he had bought the article at 20% less and sold it for ₹1,000 more, he would have made a profit of 40%. The cost price of the article (in ₹) is:

50,000

Let the CP of the article = m

man sold it at 10% profit which means he sold it at 1.1m

⇒ Had he bought it at 0.8m and sold at 1.1m + 1000 

⇒ Means 1.1m+1000- 0.8m = 40 % of 0.8m

⇒ 0.3m+1000 = 0.32m

⇒ 1000 = 0.02m

⇒ m = 50000