A and B set out from a and B at the same time, and went opposite each other. The speed comparison was 4:5. When they met, the distance ratio of the two cars was ():（

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• 1. There are two baskets of apples. The weight of basket a is 1.8 times that of basket B. If 6 kg is taken out of basket a and put into basket B, the weight of the two baskets is equal, and each of basket a and B weighs more
• 2. If the speed of a car from a to B increases by 20%, it can be 1 hour earlier than the original time. If the speed is 5 kilometers faster than the original time, it can save 1 / 9 of the time. Then how many kilometers is the distance between a and B?
• 3. The fast train and the slow train leave each other from a and B. the fast train takes one fifth of the whole journey first, and then the slow train leaves 11 kilometers later. When they meet, the slow train makes the whole scene Two out of seven are known to have a speed ratio of 5 to 4
• 4. 13: The railway from a to B is about 360 kilometers long at 16:30. How many kilometers per hour does the train travel? How many hours does it take for the children
• 5. There are 180 tons of coal on the wharf, which was originally planned to be transported by 15 trucks, but actually reduced to 9 trucks. Now how many tons more are transported by each truck than originally planned?
• 6. A cement plant plans to produce a batch of cement in January. In fact, it has completed one third of the plan in the first ten days, two fifths of the plan in the middle ten days, and another 260000 tons in the last ten days. As a result, it has exceeded one sixth of the plan. How many tons of cement does the cement plant plan to produce in January? There are several solutions? Please list them There are several solutions? Please list them all
• 7. There are 480 male and female employees, and male employees account for 3 / 5 of the total number. If male employees are transferred, and male employees account for 9 / 20 of the total number, how many are transferred?
• 8. In a workshop, the number of male workers is 40% more than that of female workers, and how much less is the number of female workers than that of male workers? Who can tell me, thank you.
• 9. In Yuxin primary school, 108 people participated in the school's science and technology group, of which the number of boys was 1.4 times that of girls?
• 10. The ratio of three numbers of a, B and C is 2:4:5. A is 12.6 less than B, so what is the average number of a and C
• 11. (1) Which quantity is changing? What quantity is not? What is the relationship between the number of trucks and the total load? Why? What is the discovery? (2) What quantity is changing? What quantity is unchanged? What is the relationship between the height of water injection and the time of water injection? Why? Try to finish it tonight!
• 12. If pile a is transported to pile B for 10 tons, pile a will be 5 tons less than pile B. now after the same several tons are transported from both piles, the remaining 1720 tons in pile B is pile A. at this time, how many tons of coal is left in pile a?
• 13. The speed ratio of a and B is 4:5 when the two cars meet on the way. A car runs 30 kilometers less than B car What is the distance between the two places?
• 14. A car at 45 kilometers per hour from a to B, 3 hours a journey of 57, how many kilometers does the car have to travel to reach B?
• 15. The distance between a and B is 480 kilometers. A and B start from the two places at the same time and run in opposite directions. They meet three hours later. The speed ratio of a and B is 9:7. How many kilometers does a and B travel in each hour?
• 16. ① When the two vehicles meet on the way, the distance of vehicle a is 60% of that of vehicle B. after the two vehicles meet, the speed of the two vehicles is the same When car B arrives at a, car a is 64 kilometers away from B, and how many kilometers does car a travel? ② car a and car B start from ab at the same time, and run in opposite directions. When the two cars meet on the way, car a drives 40% of ab. after meeting, the two cars continue to drive at the same speed. When car B arrives at a, car a has driven 90 kilometers, and how many kilometers is the distance between AB and car B
• 17. There are three cars, a, B and C, each driving at a certain speed from a to B. B starts 10 minutes later than C and catches up with C 40 minutes later; a starts 20 minutes later than B and catches up with C 1 hour and 40 minutes later?
• 18. The speed ratio of a and B is known to be 3:4. A starts 15 minutes earlier than B. when a meets B, a walks 6 kilometers less than B. It takes 2.25 hours for B to start from B to meet A. how about the speed of a and B and the distance between a and B?
• 19. The distance between a and B is 440 km. A bus and a truck leave from a and B at the same time. They meet in 4 hours. The bus runs 56 km per hour How many kilometers does the truck travel per hour? Lie equation
• 20. Three consecutive even numbers, the largest is m, then the smallest should be (). Their average is (). What is the unit of measurement?