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How many kilometers is it from one place to another? Is it the straight-line distance between the two places or the length of the highway route?
In daily life, it refers to the length of highway route, but in mathematics, it generally refers to straight line length
A certain engineering team has built a road, which has been built for 1200 meters. At this time, the ratio of the built to the unmodified is 3:2. How many meters is the total length of the road?
1200 △ 33 + 2, = 1200 × 53, = 2000 (m); a: the total length of this highway is 2000 m
As shown in the figure, the relationship between the length y (m) and the time x (d) of the highway built by an engineering team in the "village to village" project is illustrated. According to the information provided by the image, the length of the highway is () M
A. 504B. 432C. 324D. 720
In the analytic formula, if all the solutions of the function are in the following formula: y = 428, y = 428, y = 548
What do you think of the design drawing of subgrade cross section?
It's easier to first understand what's in it, then see what symbols are used for each part, and then look at the values of each part
The general content information includes: pile number, filling and excavation height of middle pile, filling area, excavation area, left width, right width, slope gradient of left and right sides, other structures, etc
RELATED INFORMATIONS
- 1. An engineering team built a 1200 meter long highway, which took 8 days to build 4 / 15 of the total length. According to this calculation, how many days will it take to complete the highway
- 2. An engineering team has built a highway, which is 1200 meters long. At this time, the ratio of the length of the highway to that of the highway is 3:10, What's the length of this highway?
- 3. An engineering team built a 1200 meter long highway, which took 8 days to build 4 / 15 of the total length. According to this calculation, how many days will it take to complete the highway
- 4. There are 100 tons of clean water tanks in the waterworks. Three water pipes of the same size are used to deliver water at the same time. After t hours, the water is discharged, Each pipe is known to drain x tons per hour 1. Write the functional relationship between T and X 3. When t = 10, calculate the value of X
- 5. Taian Wuyue Special Purpose Vehicle Co., Ltd. is a large-scale production base of special purpose vehicle. In the vehicle type test, a special purpose vehicle of this factory runs 5.6km on a straight road evenly, and the resistance is 30000N, which consumes fuel
- 6. In the model test of a special vehicle of junior high school physics, it drove at a constant speed of 80km / h for 6km on a straight road, consuming 1.5L of fuel, In the model test, a special purpose vehicle runs at a constant speed of 80km / h on a straight road for 6km. The fuel consumption is 1.5L. It is known that the density of gasoline is 0.7 * 10 cubic kg / M cubic, and the calorific value of gasoline is 4.5 * 10 seventh power J / kg. Assuming that the fuel is completely burned and the efficiency of gasoline engine is 40%, how much resistance does the vehicle receive in the process of driving at this speed
- 7. It is known that a domestic car consumes 8 liters of gasoline for every 100 km. What is the mass of gasoline consumed by the car for 100 km
- 8. The fuel consumption of a car is 10L for every 100km. Given that the density of 93 oil used by the car is 0.75 × 103kg / m3, the fuel consumption of the car for 100km is 0.75 × 103kg / m3
- 9. After driving at a constant speed of 72 km / h for 10 minutes, a car consumes 1.2 kg of gasoline, half of which is converted into traction and recharges the battery The electric energy stored in the battery increases by 7.2 × 10 ^ 6J. How much resistance does the car suffer? (the calorific value of gasoline q = 4.6 × 10 ^ 7J / kg, and Q discharge = QM)
- 10. The vehicle runs 48km at the speed of 72km / h, and the efficiency of gasoline engine is 25%（ Q gasoline = 4.6 * 10 ^ 7J / kg
- 11. It took 50 seconds for a train to cross a 1230 meter long bridge and 70 seconds to cross a 1830 meter long tunnel at the same speed To solve the equation Find the length again
- 12. It took 50 seconds for the train to cross a 1140 meter long bridge and 80 seconds for the train to cross a 1980 meter long tunnel
- 13. A road team built a road, 186 meters in total in the first six days. At this speed, it took nine days to finish. How long is the road? To use the solution proportion solution, list the relationship, such as X * y = K
- 14. After six days of building a highway, it is more than 120 meters above the midpoint, and the rest will continue to be built at the original speed. It can be completed in five days. How long is the highway?
- 15. A highway subgrade is 100km long and 50m wide. How many square kilometers and hectares does the highway subgrade cover? No wrong number
- 16. The subgrade of a highway is 100 kilometers long and 50 meters wide. How many hectares and square kilometers does the subgrade cover
- 17. In our country, the maximum speed limit is 120km / h. someone is supposed to drive along the straight road at the highest speed, The acceleration of the car when braking is 5m / S2, and the driver's reaction time (from the time when he realizes to stop to operate the brake) is 0.6-0.7s?
- 18. How to calculate the area of highway subgrade cross section? For example: 3.10m subgrade width left: 10.75 right: 10.75 slope 1:1, what's the excavation area
- 19. (2 / 2) m, width of road
- 20. What is the appropriate width of sidewalks for all levels of urban roads