A trader makes `20 %` profit in selling a washing machine at 12000 rupees. How much would he have invested in the machine? During new year sales, its price in reduced by, 1200 rupees. Is the sale now at a profit or loss? What is the percent?

If a trader raises price by 20 % and then sells at 20 % discount, does he make a profit or suffer a loss? What percent?

A trader bought an electric iron for 1200 rupees. He wants 12 % profit on selling it. At what price should he sell it?

Shine sold two crates of apple at 3500 rupees each. He got 20 % profit in one sale and 20 % loss in the other. Did the total sale result in a profit or loss? What percentage?

Shine sold two crates of apple at 3500 rupees each. He got 10 % profit in one sale and 10 % loss in the other. Did the total sale result in a profit or loss? What percentage?

A trader bought 20 quintals of rubber sheets at 19850 rupees a quintal. He spent 3000 rupees to take the load to the shop. Since prices went down, he had to sell them at 18250 rupees a quintal. How much money did he lose?

A dealer wishes to purchase a number of fans and sewing machines. He has only Rs. 5760 to invest and has space for at most 20 items. A fan costs him Rs. 360 and a sewing a machine Rs. 240. His expectation is that he can sell a fan at a profit Rs. 22 and a sewing machine at a profit of Rs. 18 . Assuming that he can sell all the items that he can buy,how should he invest his money in order to maximise the profit? Formulate this as a linear programming problem and solve graphically.

At Oruma Cooperative society, 100 kilogram of wheat grains was bought at 25 rupees a kilogram. 500 rupees was spent in washing, drying, grinding and packaging. 100 packets were made, to be soldat 35 rupees a packet. 20 packets of powder was spoiled and the remaining sold. Did they make a profit or suffer a loss in this sale? How much?

The price of a car is 530000 rupees now. The manufacturer decides to reduce the price by 2 % next month. What would be reduction in price? What would be the new price?

A cottage industry manufactures pedestal lamps and wooden shades, each requiring the use of a grinding/cutting machine and a sprayer. It takes 2 hours on grinding/cutting machine and 3 hours on the sprayer to manufacture a pedestal lamp. It takes 1 hour on the grinding/cutting machine and 2 hours on the sprayer to manufacture a shade. On any day, the sprayer is available for at the most 20 hours and the grinding/cutting machine for at the most 12 hours. The profit from the sale of a lamp is Rs.5 and that from a shade is Rs.3. Assuming that the manufacturer can sell all the lamps and shades that he produces, how should he schedule his daily production in order to maximise his profit?

John deposited 2500 rupees on the first of January in a bank where interest is compounded half-yearly at 6 % annual rate. On the first of July, he deposits 2500 rupees more. How much would he have in his account at the end of the year?