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At 7:49 a.m. on April 14, 2010, Yushu County, Qinghai province suffered a 7.1 magnitude earthquake. After receiving the production task, a tent production enterprise increased production investment and improved production efficiency. In fact, it produced 200 more tents per day than the original plan. It is known that the time used to produce 3000 tents is the same as that used to produce 2000 tents per day How many tents can be produced?
Suppose that the enterprise can produce X tents every day, then the original plan is to produce (X-200) tents every day. (1 point) from the Title Meaning: 3000x = 2000x − 200. (4 points) the solution is: x = 600. The test shows that x = 600 is the solution of the original equation, so the solution of the original equation is x = 600. (1 point) answer: now the enterprise can produce 600 tents every day
On April 14, 2010, a 7.1 earthquake occurred in Yushu, Qinghai Province. After the earthquake, a large number of relief goods were transported to the disaster area. The following items are related to chemistry: (1) tents; (2) vegetables; (3) fireproof clothes; (4) disinfectants; (5) clothes; (6) medicines ()
A.①②③④ B.②③④⑤ C.①③④⑤⑥ D.①②③④⑤⑥
If there are vegetables, the answer will come out at once
Taizhou Red Cross sent relief materials to Yushu earthquake stricken area in Qinghai Province, 20% of which were delivered in the first time, 210 tons in the second time, and 1 / 3 of the remaining materials,
One third of this material. How many tons are there in total
450 tons
210 divided by (1-20% - 1 / 3) = 450 tons
In April 2012, an earthquake occurred in Yushu County, Qinghai Province. In order to support the disaster area, a storage depot prepared a batch of relief materials
In April 2012, an earthquake occurred in Yushu County, Qinghai Province. In order to support the disaster area, a reserve has prepared a batch of relief materials. For the first time, 20% of the goods were transported to the disaster area, 720 tons were transported to the disaster area for the second time, and the sum of the previous two was transported to the disaster area for the third time. How many tons of these relief materials
2400 tons
Let the total amount be x tons
0.2x+720+0.2x+720=x
X = 2400
If you just want to get this answer, I'll give it to you now, but please study hard and make progress every day
RELATED INFORMATIONS
- 1. It transported 360 tons of goods, loaded 6 train cars and 15 cars; transported 440 tons of goods, loaded 8 train cars and 10 cars. How many tons of goods were loaded in each train car and each car?
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- 6. There are two kinds of chemical fertilizers in the warehouse, one is 120 tons, and the other is 90 tons. How many times can they be transported by two trucks with carrying capacity of 8 tons and 6 tons respectively? 120÷8+90÷6 （120+90）÷（8+6） =15+15 =210÷14 =30 (Times) = 15 (Times)
- 7. To support Sichuan earthquake relief, the cross will transport 160 tons of relief goods to the disaster area In order to support the earthquake relief in Sichuan, the cross society has to transport 160 tons of relief goods to the disaster area for no more than 12 days. There are two kinds of cars to rent, the freight of type A is 30 yuan per ton, and that of type B is 25 yuan per ton. The transportation capacity is 16 tons per day for type A and 12 tons per day for type B, but only one kind of car can be rented every day. Due to the long distance, no car runs once a day There are three kinds of renting schemes: 1. Renting only type A; 2. Renting only type B; 3. Renting type A for a period of time, then forming type B for a period of time, just 12 days to complete If you are the person in charge of the cross society, which one will you choose (considering the freight) and explain the reason
- 8. If each truck carries 3.5 tons of goods, I can't transport two tons of the goods. If each truck carries four tons of goods, one ton of the goods can be loaded after loading the goods. How many tons of these goods are there in total?
- 9. A batch of cars can carry several tons of goods. If each car carries 3.5 tons, there will be 2 tons more. If each car carries 4 tons, there will be another ton How many tons are there in this shipment?
- 10. There are 15 trucks with a load of 2 tons and 4 tons, which can transport 54 tons of yellow sand at one time. How to reasonably arrange these two trucks with different load capacities
- 11. After the strong earthquake occurred in Yushu area of Qinghai Province, the state immediately launched the disaster relief plan to actively carry out the transportation of relief materials to the disaster area and the treatment of the wounded. It is known that Xining Airport and Yushu airport are 800 kilometers apart, and plane a and B start from Xining and Yushu along the same route, facing each other. As shown in the figure, line AB and CD respectively indicate that plane a and B leave Yushu airport (Note: for convenience of calculation, the unit of distance s in the plane rectangular coordinate system is set as (100 km)). Observe the image and answer the following questions: (1) how many hours after the departure of plane a, does plane B leave Yushu airport? How many kilometers per hour are the flight speeds of aircraft a and B? (2) (3) when a and B met, how many hours did B fly? How many kilometers from Xining Airport?
- 12. 12 tons of disaster relief materials were transported to Yushu earthquake stricken area by car, and 6 / 11 of these materials were transported three times. On average, what percentage of these materials were transported each time? How many tons each time?
- 13. The table below shows the quality of vegetables a and B that can be transported by each vehicle. Each vehicle is required to be fully loaded according to the regulations, and each vehicle can only transport one kind of vegetables. If 8 vehicles are used to transport 11 tons of vegetables, how many vehicles are there for vegetables a and B Vegetable type A and B Tonnage per vehicle at full capacity 1.5
- 14. A local product company organizes 20 vehicles to ship three kinds of local products of a, B and C for sale in other places. According to the plan, 20 vehicles will be shipped, and each vehicle can only ship the same kind of local products, and must be full. Suppose the number of vehicles carrying a kind of local products is x, and the number of vehicles carrying B kind of local products is y. according to the information provided in the table below, the number of vehicles carrying a kind of local products of a, B kind of local products of a, B type of local products of a, B type of local products of B is y Carrying capacity of each vehicle (ton) 8 65 Profit per ton of local products (100 yuan) 12 16 10 How many tons of local products have these 20 cars shipped? How many ten thousand yuan is the total profit after the sale of this batch of local products?
- 15. A fruit company uses 20 vehicles to transport 42 kinds of a, B and C fruits to other places for sale. Each vehicle can only transport the same kind of fruit, full of each kind of fruit
- 16. In the fight against the "5.12" Wenchuan earthquake, a city organized 20 vehicles to transport 100 tons of food, medicine and daily necessities to the resettlement sites. According to the plan, all 20 vehicles will be loaded, and each vehicle can only carry the same kind of relief materials and must be full Type of goods and materials food and drug daily necessities transport capacity per vehicle (ton) 654 per ton freight required (yuan / ton) 120160 100 (1) suppose the number of vehicles carrying food is x and the number of vehicles carrying medicine is y. find the functional relationship between Y and X; (2) if the number of vehicles carrying food is not less than 5 and the number of vehicles carrying medicine is not less than 4, how many schemes are there for the arrangement of vehicles? (3) under the condition of (2), if the total freight is the least, which arrangement should be adopted? And calculate the least total freight
- 17. In an earthquake relief, a city organized 20 vehicles to transport three kinds of relief materials, including food, medicine and daily necessities, to the resettlement area. According to the plan, all 20 vehicles should be transported, and each vehicle can only carry one kind of relief materials and must be filled up Type of goods and materials: food, drugs and daily necessities: Freight (RMB) 120 160 100 (1) how many tons of disaster relief materials are loaded by 20 vehicles? (2) How much is the total cost of shipping this batch of disaster relief materials?
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