The speed ratio of car a to car B is 4:5. The ratio of the time taken by car B to car a to complete the same journey is 4:5______ ．

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• 1. Party A and Party B set out from ab at the same time and went opposite each other. The speed of car a was 60% faster than that of car B. after the two cars met on the way, they continued to move forward at the original speed When arriving at B, B is 26km away from the midpoint of AB, what is the distance between ab
• 2. The world-famous Hangzhou Bay sea crossing bridge is 36 km long, with a design speed of 100 km / h. Q: the vehicle mass is 5 x 103 kg, and the design speed is uniform on the bridge Hangzhou Bay sea crossing bridge is 36 km long and the design speed is 100 km / h Q: the mass of the car is 5x103kg. When driving at the designed speed on the bridge, the resistance is 0.06 times of the weight of the car. Calculate the power of the car's engine. (G is 10N / kg)
• 3. When a car runs along a straight road, it first passes through the first 3 / 1 displacement at speed V1, and then passes through the other 2 / 3 displacement at speed V2 = 50km / h, If the average velocity of the whole displacement is 37.5km/h, what is the velocity in the first displacement thank you Wrong number on the top. It's 1 / 3 displacement
• 4. The average speed of the car in the first 10 km is 40 km / h, and the average speed in the last 10 km is 50 km / h
• 5. The car starts from the station and runs at a speed of 4m / s along the straight road at a uniform speed. After 2S, a motorcycle starts from the same station and accelerates to catch up The car starts from the station and runs at a speed of 4 m / s along the straight road at a constant speed. After 2 s, a motorcycle starts from the same station and accelerates to catch up with the car with an acceleration of 3 M / S2. How long does it take for the motorcycle to catch up with the car after it starts? How far is it from the starting point when the motorcycle catches up with the car?
• 6. The distance between a and B is 90 kilometers. How many kilometers does a car leave B after driving from a to B at the speed of 80 kilometers per hour
• 7. The highway from city a to city B is 160 km long. The speed of a car on the expressway is 80 km / h, and that on the ordinary highway is 40 km / h. how much time does it save to take the expressway from city a to city B?
• 8. Someone rides a motorcycle to work from place a to place B. He has to walk 40 kilometers of flat road, 48 kilometers of uphill road and 36 kilometers of downhill road. His speed on the flat road is per hour 20 km, 2 km faster than 1.2 times the uphill speed, and the downhill speed is 1.6 times the uphill speed. How many hours does it take for him to go back and forth? (can you explain each step clearly?)
• 9. The total length of an expressway is 150 km, the speed of the car is 50 km / h, and the remaining distance after X hours is y km The functional relationship between Y and X is? Help, can ~ ~ ~ sincerely ask for help
• 10. What is meant by "driving motor vehicles on roads other than expressways and urban expressways without following the prescribed lanes" What are the circumstances of such violation? I hope I can get a specific answer, because I just got punished and I can't remember where I broke the rules
• 11. If the speed ratio of a and B cars moving in a uniform straight line is 3:4 and the distance ratio is 6:5, then the movement time ratio of the two cars is () A. 9：10B. 5：3C. 5：8D. 8：5
• 12. The speed of a train is 60% faster than that of a car. How much slower is the speed of a car than that of a train?
• 13. Car a is 13 times faster than car B, that is to say, car B is 13 times slower than car a______ (judge right or wrong)
• 14. At the same time, the bus and freight car drive in the opposite direction from the midpoint of a and B towns. Three hours later, the bus arrives at a town, and the freight car is 35 kilometers away from B town It is known that the speed of freight cars is 3 / 4 of that of passenger cars. How many kilometers are there between a and B towns
• 15. A and B drove from a and B at the same time. After 8 hours of meeting, they drove 384 kilometers, It is known that the speed of a car is one fourth faster than that of a car. How many kilometers are there between a and B?
• 16. A. B is 384km away from each other. Car a and B start from the same place at the same time, and run in opposite directions for 4 hours. The speed of car a and B is known A. B is 384 kilometers away from each other. A and B start from the same place at the same time and meet each other for 4 hours. It is known that the speed ratio of car a and car B is 7:5. How can car a and car B travel thousands of meters per hour?
• 17. The passenger car and the freight car drive in the opposite direction from the midpoint of a and B at the same time. When the passenger car reaches a, the freight car is 60 kilometers away from B When the bus arrives at the place a, the truck is 60 kilometers away from the place B. It is known that the speed ratio of the bus to the truck is 7:5. How many kilometers are there between the two places?
• 18. The distance between the two places is 628 kilometers. Car a travels 60 kilometers per hour, while car B travels 80 kilometers per hour
• 19. The distance between station a and station B is 520 kilometers. Car a travels 80 kilometers per hour, while car B travels 60 kilometers per hour. The two cars leave from station a and station B at the same time and go opposite each other. After the two cars leave for a period of time, car a stops for 30 minutes for some reason, and then goes on to meet with Party B. how many hours did car B walk when they met? (use the equation)
• 20. 5. Class 1 took a car for a spring outing. The car drove at a speed of 40 km / h for 30 minutes, then drove into the expressway and drove for 45 minutes at a speed of 80 km / h Find the average speed of a car