Kuldeep sells an article for ₹ 3240 and earns a profit of 20%. What is the cost price of the article?

If an article is sold at 200 % profit then the ratio of its cost price to its selling price will be 

A man bought 20 dozen eggs for Rs. 720. What should be the selling price of each egg if he wants to make a profit of 20 %? 

An article is sold at a profit of 20% of its cost price. If cost price and selling price reduces by Rs 10 and Rs. 5 respectively, then the percentage profit increased to 30%. Find the cost price?

The price of 6 pencils is Rs. 30 and that of 12 pens is Rs. 120. What is the average price of 50 pencils and 50 pens?

A phone is sold for Rs. 860 at a loss of 20% for how much should it be sold gain 10%?

A store sells a watch for a profit of 25% of the cost. Then the percentage of profit against selling price is-

By selling an article for Rs. 450, I lose 20%. For what price should I sell it to gain 20% ?