A commodity is first priced at a 20% profit margin, and then sold at a 10% discount. As a result, the profit is 256 yuan. What is the cost of this commodity? If the perimeter of a rectangle is 28 cm, if the length increases by 10%, the width decreases by 25%, and the perimeter remains unchanged, the area of the original rectangle can be calculated

Let cost be X
(x+20%x）*0.9-x=256
1.2x*0.9-x=256
1.08x-x=256
0.08x=256
x=3200
Length + width = 28 △ 2 = 14
Let the length be x and the width be 14-x
(x+10%x)+[(14-x)-(14-x)*25%]=14
x+0.1x+14-x-3.5+0.25x=14
0.35x=3.5
x=10
Width = 14-10 = 4
Area = 10 * 4 = 40 square centimeter

RELATED INFORMATIONS

1. A commodity is priced at 25% of its cost, and then sold at a 10% discount to attract customers. As a result, the merchant makes a profit of 700 yuan______ Yuan
2. A commodity is priced at 25% of its cost, and then sold at a 10% discount to attract customers. As a result, the merchant makes a profit of 700 yuan______ Yuan
3. A store raises the price of a commodity by 50% and sells it at a 20% discount. As a result, each commodity still makes a profit of 10 yuan. What's the cost of this commodity
4. A store raises the price of a commodity by 50% and then sells it at a 20% discount. As a result, the profit of each commodity is still 10 yuan, What is the cost of this product? Fengfeng went to the stationery store to buy exercise books. The salesperson told her that if there were more than 10 copies, the part after the more than 10 copies would be given a 70% discount. Fengfeng bought 20 copies, which was 1.8 yuan cheaper. Do you know the original price of each copy?
5. If a store increases the cost price of a product by 50% and sells it at a 20% discount, and the selling price is 480 yuan, how much profit can it make?
6. When a store increases the cost price of a commodity by 50%, the price of the commodity is 450 yuan, and it is sold at a 20% discount, then it can make a profit______ Yuan
7. A commodity is priced at 20% profit, and then sold at a 20% discount, resulting in a loss of 64 yuan. What is the cost price of this commodity?
8. A commodity is priced at 20% profit, and then sold at 20% discount, resulting in a loss of 64 yuan. How much is the cost of this commodity?
9. If you buy a TV set at the current price, you will get a profit of 960 yuan. If you sell it at a 20% discount, you will lose 832 yuan. What is the cost price of the product
10. If a commodity is sold at 20% discount, it will lose 832 yuan. How much is the cost of the commodity?
11. What is the profit margin of a commodity that is marked at a 20% increase in cost and sold at a 10% discount at 270 yuan?
12. The cost price of a garment is 80 yuan. It is prepared to be priced at 30% profit rate. In order to attract customers, the merchant sells the garment at 10% discount. Question: (1) what is the actual price of the garment? (2) What's the final profit rate of this dress?
13. Exploration exercise: (11 points) a store will increase the price of a certain garment by 40% and then sell it at a discount of 20% (that is, 80% of the price). As a result, each garment still makes a profit of 15 yuan. How much is the cost of each garment? We know that the profit of each commodity is the difference between the selling price of the commodity and the cost price of the commodity______ The actual price of each garment is______ ; the profit per garment is______ Thus, the equation is given______ Solving the equation, we get x = 125, so the cost price of each garment is 125 yuan
14. Profit rate = profit / cost * 100%. A commodity is sold at 80% of the price, and there is still 20% profit. What is the expected profit rate in the pricing period? The price of goods purchased is called cost, and the price sold is called retail price. Retail price cost is called profit
15. Ginza shopping mall bought back a batch of goods and priced them at 20% profit margin. Because of poor quality, they could only sell them at 80% of the price. How much was the loss of 400 yuan? Use it quickly!
16. A shopping mall is priced at 20% profit rate, and then sold at 8.8% discount. The total profit is 84 yuan. How much is the cost of the shopping mall?
17. The total cost of two kinds of goods is 200 yuan. The price of goods a is set at 30% of the cost, and that of goods B is set at 20% of the profit. Later, the two kinds of goods are sold at 90% of the price, and the total profit is 27.7 yuan?
18. The total cost of two kinds of goods is 200 yuan. The price of goods a is set at 30% of the cost, and that of goods B is set at 20% of the profit. Later, the two kinds of goods are sold at 90% of the price, and the total profit is 27.7 yuan?
19. The total cost price of the two commodities is 200 yuan. The price of commodity a is 30% of the profit, that of commodity B is 20% of the profit, and that of the last two commodities is 90%
20. The total cost of a and B goods is 2200 yuan. A goods are priced at 20% profit and B goods are priced at 15% profit. Later, according to the market situation, they are sold at 90% profit. The total profit is 131 yuan. What are the profits of a and B goods?