The two cars of a and B set out at the same time with a distance of 300 kilometers. After 2.5 hours, the two cars met How to find the speed of a and B vehicles by traveling 10 kilometers per hour? (equation solution)

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• 2. Second volume of junior high school fractional application problems In a rice field of a hectare, if one person transplants rice, it will take M days to complete; if one transplanter works 3 days earlier than 10 people transplanting rice, how many times is the work efficiency of one transplanter than that of one person?
• 3. A. The distance between city B and city a is 50 kilometers. City a starts from city a by bike to city B. one hour and 30 minutes later, city B starts from city a by motorcycle to city B. It is known that the speed of city a is 2.5 times that of city B, and city B arrives one hour earlier than city A. what are the speeds of city a and city B?
• 4. A calculation problem of mathematical fractional equation (x ^ 2 + 7x-8) / (x-1) + (x ^ 2 + X + 3) / (x + 2) + (2x ^ 2-x + 7) / (x + 3) = 4x, find the value of X I've solved it many times, but I can't get the answer
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• 6. Mathematical application problems. Equations to be listed. Fractional application The speed ratio of a to B is 2:3. The distance from a and B to C is 10.5 km and 12 km respectively. If a starts one hour earlier than B, it can arrive 30 minutes earlier than B. how much speed can a and B walk?
• 7. Two hours after the Wenchuan earthquake, an armed police unit set out from XX County for rescue. They left at 1:15 a.m. on the 13th, but they met with trouble on the way. They decided to walk, but they were delayed for an hour because of saving people in Dali County. Then, they sent a detachment to increase the walking speed by 1 / 9. They arrived in Wenchuan at 23:15 on the 13th~ What is the average speed of the advance team from Lixian to Wenchuan? I'll add it! Also ask the time from the beginning to Lixian, the speed and time from Lixian to Wenchuan (this is the table) It's 30 kilometers from Lixian to Wenchuan and 60 kilometers from Lixian to Wenchuan It is the time from XX county to Li County, the speed and time from Li county to Wenchuan What is the average speed of the advance team from Lixian to Wenchuan? ``````````````````````````````````````````````````````````` Dizzy``````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````
• 8. Xiao Wang and Xiao Li come to a grain store twice a month to buy rice at the same time. The price of rice has changed twice. The price of rice is x yuan / kg for the first time and Y yuan / kg for the second time?
• 9. On the application of fraction in Mathematics It is known that the new method can complete the task that the common method can complete in 2 hours. If the two methods are used independently, how many hours can they complete the task?
• 10. Application of fractional equation in junior high school Party A and Party B type a manuscript together. After 4 hours, Party A has another task, and Party B will type another 6 hours to complete the task? Notice the fractional equation!
• 11. A car from a to B, 60 kilometers per hour, 12 hours can reach. Return, speed increased by 20%, how many hours can return to a? Use the equation!
• 12. The two trains a and B leave each other from the two cities at the same time. When car a is 36 kilometers less than car B, the distance between the two trains is 264 kilometers. It is known that the speed ratio of car a and car B is 5:6. How many kilometers is the distance between the two cities?
• 13. Two cars are going from a and B at the same time. One car travels 40km per hour and the other 45km per hour. The two cars meet at 40km away from the midpoint. When do they meet How many hours? How many hours have you been walking
• 14. A and B set out from a and B at the same time. A rode a bicycle, B drove a car, and drove along the same route at a constant speed. After three hours of departure, they met. It is known that B traveled 90 kilometers more than a when they met, and arrived at a after 1:00. What are the speeds of a and B?
• 15. The walking speed ratio of Party A and Party B is 13:11. If Party A and Party B start from AB and walk in opposite directions at the same time, they will meet in 2.5 hours. If they walk in the same direction, how many hours will it take for Party A to catch up with Party B?
• 16. It takes 12 hours for a truck to go from place a to place B, and 16 hours for a bus to go from place B to place A. now, the two cars go from place a and place B respectively After 9 hours, how much is the distance between the two cars?
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