![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
A and B leave from station AB at the same time. For the first time, they meet at 90km away from station A. after meeting, they continue to drive at the same speed and return to each other's place of departure immediately. For the second time, they meet at 50km away from station a to find the distance between two places
(90 × 3 + 50) △ 2, = 320 △ 2, = 160 (km). A: the distance between AB and ab is 160 km
When someone rides a motorcycle from home to the railway station, if he travels 30 kilometers per hour, he will be 15 minutes earlier than the train. If he travels 18 kilometers per hour, he will be 15 minutes later than the train's departure time. How many hours is there before the train's departure time when he starts from home
As shown in the question: when driving 30 km / h, driving 30 km / 60 min = 0.5 km / min
When driving 18 km / h, driving per minute: 18 km / 60 min = 0.3 km
The time he leaves the train when he starts from home is: X
Then: 0.5 (X-15) = 0.3 (x + 15)
0.5x-7.5=0.3x+4.5
0.5x-0.3x=7.5+4.5
0.2x=12
x=60
Therefore, when he set out from home, the time from the train was 60 minutes, or 1 hour
If you go to the railway station by motorcycle from home, if you walk 30 kilometers per hour, it will be 15 minutes earlier than the driving time. If you walk 18 kilometers per hour, it will be 15 minutes later than the driving time. Now you plan to arrive at the railway station 10 minutes earlier than the driving time, then the speed of the motorcycle should be ()
A. 25km / h B. 26km / h C. 27km / h D. 28km / h
Suppose the distance from the motorcycle to the railway station is s kilometers, and the time of driving to the railway station is t hours, because if you walk 30 kilometers per hour, it is 15 minutes earlier than the driving time, then t-s30 = 14. ① if you walk 18 kilometers per hour, it is 15 minutes later than the driving time, then s18-t = 14 v. Then we need t-sv = 16 and substitute the values of S and T into v = 27
RELATED INFORMATIONS
- 1. Li Wei rides a motorcycle from home to the railway station. If he travels 30 kilometers per hour, he will be 15 minutes earlier than the train. If he travels 18 kilometers per hour, he will be 15 minutes later than the train's departure time. If Li Wei plans to arrive at the railway station 10 minutes before the train leaves, what's the speed of his motorcycle at this time?
- 2. When a arrives at B, B is 10 kilometers away from A. when B arrives at a, a exceeds B by 20 kilometers. How many kilometers are there between a and B?
- 3. When car a finishes 120 kilometers in 1 hour and 30 minutes, it just finishes one third of the whole journey. At this time, car B's journey is 60 kilometers more than two fifths of the whole journey. After a few hours, two cars meet each other. The best way to solve the problem is to write it down!)
- 4. A motorcycle travels 60 kilometers in two fifths of an hour. How many kilometers does it travel in one hour
- 5. A and B start from ab at the same time. It takes 20 hours for car a to B and 30 hours for car B to A. how long does it take for the two cars to meet
- 6. The distance between the two places is 200km. The speed of a is 20km / h, and the speed of B is 30km / h. A starts for one hour, and after a few hours, the two people are 30km apart
- 7. The distance between a and B is 180km. A and B travel from a to B at the same time. A travels 20km per hour, B travels 30km per hour. B immediately returns to B, and travels 40km per hour when it returns. How far is B from a to meet a
- 8. The distance between car a and car B is 200 kilometers. Car a travels 20 kilometers per hour, car B travels 30 kilometers per hour. On the way, car B stops for one hour How many kilometers did a travel when they met?
- 9. The distance between the two places is 200 km. The speed of vehicle a is 70 km / h, and that of vehicle B is 50 km / h. both vehicles run in the same direction at the same time How long do we meet?
- 10. A and B drive from city a to city B at the same time. Car a travels 60 kilometers per hour and car B 45 kilometers per hour Car a and car B drive from city a to city B at the same time. Car a travels 60 kilometers per hour, and car B travels 45 kilometers per hour. After 5 hours, car a encounters a bus coming face to face. Another hour later, car B also encounters the bus. How many kilometers does the bus travel per hour? (equation solution. One yuan equation)
- 11. When a bus arrives at a station, 4 / 7 of all passengers get off and 33 passengers come up. At this time, the number of passengers on the bus is 5 / 6 of the original number. How many passengers are there?
- 12. When someone walks from a to B, there are regular buses between a and B, and the departure intervals between the two places are equal. He finds that a bus to a comes every 6 minutes, and a bus to B comes every 12 minutes. How many minutes does the bus leave from their respective departure station?
- 13. From a to B, it took 6 hours to go and 111 hours to return A. 211B. 50%C. 12D. 111
- 14. If the train between a and B stops at three stations, there will be______ Different fares (same round-trip fare) need to be prepared______ I want to buy a ticket
- 15. How many different fares are there? How many kinds of tickets do you need to prepare?
- 16. How many different fares are there for a passenger train between a and B stopping at two stations
- 17. If the train between a and B stops at three stations, there will be______ Different fares (same round-trip fare) need to be prepared______ I want to buy a ticket
- 18. If the train between a and B stops at three stations, there will be______ Different fares (same round-trip fare) need to be prepared______ I want to buy a ticket
- 19. The speed of an object moving in a uniform straight line is 108 kilometers per second. What is the distance of the object in 20 minutes? When it is 1800 meters, how long does it take
- 20. How to breathe in 1000m running? What should you do in 1000m running? Make it easy to run