While selling an article for Rs 18450, a person suffered a loss of 50%. At what price he should have sold the article (in Rs) to earn a profit of 50%?

A vendor buys bananas at 12 for 45 and sells at 5 for 35. What will be the gain ? 

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?

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% ? 

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

Direction: A shopkeeper has some kg. rice of same price. He sold 150 kg. rice at 25 Rs. per kg. and earned a profit of 25%, another 180 kg. rice is sold at a profit of 20% and rest are sold at a loss of 10%. If the shopkeeper earns Rs. 1230 profit on all the rice that he has sold then answers the following question:

What is the total quantity of rice that the shopkeeper has? 

If apples are bought at the rate of 30 for a rupee. How many apples must be sold for a rupee to gain 20%?