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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?
One third of 6 out of 11 is equal to the volume of transportation each time, one third of 6 out of 11 of 12 tons, and six out of 33 is about 2.18 tons
Yushu County, Qinghai Province, China on April 14, 2010, a 7.1 magnitude earthquake occurred in the early morning, and a batch of relief materials were urgently transported to the disaster area
If the goods and materials are transported by large trucks and small trucks at the same time, the ratio of the goods and materials transported in two days is 1. If the goods and materials are transported by large trucks alone, 1 / 2 of the goods and materials can be transported in five days. If the goods and materials are transported by small trucks alone, 4 / 5 of the goods and materials can be transported in a few days
Wuwu, answer quickly. I'm useful
What's the ratio of the goods and materials transported two days later to this batch of goods and materials
The total quantity of the goods is 1
The daily volume of large trucks is 1 / 2 divided by 5 = 1 / 10
If the daily freight volume of small truck is x, then: (x + 1 / 10) * 2 = 1, x = 2 / 5
4 / 5 divided by (1 / 10 + 2 / 5) = 8 / 5 days
The Yushu earthquake touched the hearts of people all over the country. An armed police force was ordered to deliver a batch of relief materials to the disaster area
After filling up the truck at road a, drive at a speed of 60km / h at a constant speed to the disaster area B 360km away from road a. the relationship between the remaining oil quantity y (L) in the tank and the driving time x (H) recorded in the table below is as follows:
Travel time x (H) 0 1 2 3 4
Remaining oil quantity y (L) 150 120 90 60 30
(1) Please use one of the functions you have learned to establish the functional relationship between Y and X, and explain the reason for choosing this function (it is not required to write the value range of the independent variable)
(2) If the speed and fuel consumption of the truck remain unchanged, and the truck arrives at C after 4h, and there is a gas station at d 12km in front of C, how many liters of fuel should be added at d at least to make the truck arrive at disaster area B, unload the goods and return to D for refueling? (according to driving experience, for the sake of safety, the remaining fuel in the tank should not be less than 10L)
Hello, Liang Ge Na AI_ Hi: (1) drawing: five groups of data are described in rectangular coordinate system, and these five points are on a straight line, so y and X satisfy the first-order functional relationship. Suppose the functional relationship between Y and X is: y = KX + B (K ≠ 0), then there is: 150 = B120 = K + B, and the solution is k = - 30, B = 150 the functional relationship between Y and X is: y
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?
(1) It can be seen from the figure that plane B starts from Yushu airport one hour after plane a starts. The flight speed of plane a is V1 = 8005 △ 100 = 1.600 km / h, and the flight speed of plane B is V2 = 8004 △ 100 = 200 km / h. (2) the functional relationship between s and t of plane a is s = − 85t + 8, and the functional relationship between S and t of plane B is s = 2 (t-1) = 2T -
RELATED INFORMATIONS
- 1. 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?
- 2. 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?
- 3. 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?
- 4. The first batch of 360 tons of chemical fertilizer transported to a certain place requires 6 trains plus 15 cars, and the second batch of 440 tons requires 8 trains plus 10 cars. How many tons are loaded into each train skin and each car on average
- 5. A train loaded a batch of goods. Originally, 36 tons of energy-saving goods were loaded, but 80 tons were not loaded. Later, 4 tons more were loaded in each car, As a result, after loading the goods, there are just two carriages left. How many carriages does this train have? How many tons does this batch of goods have?
- 6. How many cars are there? How many tons are there in this batch of goods
- 7. There are 32 tons of goods at the wharf. After six times of transportation with X tons of carrying capacity, there are still 5 tons left. Write the equivalent relation and list the equation It's urgent! Today's homework
- 8. 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)
- 9. 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
- 10. 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?
- 11. 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
- 12. 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?
- 13. 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
- 14. 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
- 15. 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?
- 16. The distance between a and B is 424km. A truck and a passenger train drive from a and B at the same time. After 4 hours, they meet. The bus is 14km faster than the truck per hour. What's the speed of the two cars?
- 17. Buses and trucks travel from two places 852km apart and face each other at the same time. When they meet, the distance of buses is 189km less than twice that of trucks. How many kilometers do buses and trucks travel?
- 18. The passenger car and the freight car run from a and B at the same time. They meet each other in five hours. After meeting, the passenger car goes to B in three hours. It is known that the freight car travels 63 kilometers per hour, and how many kilometers per hour does the passenger car travel?
- 19. The length of the railway between city a and city B is 435 meters. The passenger and freight trains start from the two cities at the same time and travel in opposite directions. The passenger trains travel 60 kilometers per hour and the freight trains 45 thousand per hour Then the above question, meters, how many hours after the two cars 15 kilometers apart?
- 20. The distance between the two places is 720 kilometers, and the passenger cars and freight cars are running from both places at the same time. It is known that the passenger cars are 80 kilometers per hour, and the speed ratio of the passenger cars and freight cars is 4:3. After a few hours, the distance between the two cars is 20 kilometers?