![](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>)
When a and B start from a and B, the speed ratio of a and B is 5:4. After meeting, the speed of a decreases by 20%, and the speed of B increases by 20%. So when a arrives at B, B is still 10 kilometers away from a, so how many kilometers is the distance between a and B?
The arithmetic solution is as follows:
After meeting, the speed ratio of a and B is 5 × (1-20%): 4 × (1 + 20%) = 5:6
When meeting, B walked the whole journey 4 (5 + 4) = 4 / 9
So after meeting, a went to B, and a took 4 / 9 of the whole journey
So after meeting, a goes to B, and B goes the whole way 4 / 9 △ 5 × 6 = 8 / 15
So B took a total of 4 / 9 + 8 / 15 = 44 / 45
So the distance between AB and ab is 10 △ 1 / 45 = 10 △ 1 / 45 = 450 km
A: AB is 450 kilometers away
The speed ratio of car a and car B is 5:4, and the speed of car a increases by 20% after meeting,
The speed of car B increases by 25%, so that when car a arrives at place B, car B is still 15 kilometers away from place a
@"Science tutor" answers questions for you. After meeting, the speed ratio of the two cars is 5 * (1 + 20%): 4 * (1 + 25%) = 6:5. After meeting, car a runs 4 / (5 + 4) = 4 / 9 of the whole journey. When car a arrives at place B, car B runs (4 / 9) * (5 / 6) = 10 / 27 of the whole journey. When car a arrives at place B, car B still has 1-4 / 9 of the whole journey
It is known that car a is 20 kilometers slower than car B per hour. The speed ratio of car a and car B is 5:7. How far is the distance between AB and car B?
When 20 × 6 = 120 km, car a takes less distance than car B
When the time is fixed, the express delivery ratio is the distance ratio. When the two cars meet, the distance ratio is 5:7
That is to say, car a takes the whole journey: 5 / (5 + 7) = 5 / 12
Car B took the whole journey: 7 / (5 + 7) = 7 / 12
Car a is short: 7 / 12-5 / 12 = 1 / 6
Whole journey (distance between two places): 120 △ 1 / 6 = 720 (km)
The two cars of a and B are facing each other from ab at the same time, and they meet at 5km away from the midpoint. It is known that the speed of car a is 6 / 7 of that of car B, and how many kilometers are there between a and B
The distance between the two places is 2x km,
Because the speed of car a is 6 / 7 of that of car B, the distance of car a is 6 / 7 of that of car B
So (X-5) / (x + 5) = 6 / 7
So x = 65
So 2x = 130 km, that is, the distance between the two places is 130 km
RELATED INFORMATIONS
- 1. A and B start from a and B at the same time, and run in opposite directions. They meet at a distance of 6 km from the midpoint. It is known that the speed ratio of a and B is 7:8 How many kilometers apart?
- 2. It is known that it takes 6 hours for passenger cars and 8 hours for freight cars to start from 490 kilometers apart at the same time?
- 3. The distance between Party A and Party B is 595km. The passenger cars and trains depart from Party A and Party B at the same time and meet after 3.5 hours. The speed ratio of passenger cars and freight cars is 9:8. How many kilometers do the passenger cars and freight cars travel per hour?
- 4. The distance between the two places is 460 km. Two passenger and freight cars leave from the two places at the same time. After 4 hours of meeting, the known passenger cars travel 62 km per hour and the freight cars 62 km per hour How many meters is it
- 5. The distance between a and B is 260 kilometers. The bus and the truck are going from a and B at the same time. They meet 95 meters away from B. after meeting, they continue to move forward. When the bus arrives at B, the truck immediately returns to A. how many meters away from a? I want similar questions, from simple to difficult
- 6. If the departure time of the two vehicles is 6:00, then they meet at 11:00. If the departure time of the two vehicles is 7:00 and 8:00 respectively, then they meet at 12:40. Now the departure time of the two vehicles is 10:00 and 8:00 respectively, when will they meet? (the time mentioned in this question is the same day, using the 24-hour timing method)
- 7. At the same time, passenger cars and freight cars leave from a and B. passenger cars travel 60 kilometers per hour, and freight cars travel 110 kilometers per hour. When freight cars arrive at 25 o'clock, passenger cars have already traveled 45 kilometers. How many kilometers is the distance between the two places?
- 8. On a map with a scale of 1:4000000, it is measured that a and B are 9 cm apart. A truck and a bus leave the two places at the same time and meet each other in 4 hours How many kilometers does the truck travel per hour?
- 9. There are 380 kilometers from Qingdao to Jinan. Buses and trucks run in opposite directions. Buses run 55 kilometers per hour and trucks run 45 kilometers. How many hours do they meet?
- 10. It takes three hours for a bus and five hours for a freight car to travel the same section of the road. The two cars leave from a and B at the same time. After six hours of meeting, it takes a total of six hours for a freight car to complete the whole journey______ Hours
- 11. After 12 hours, they meet and continue to drive at the same speed. After 10 hours, car a arrives at place B and car B returns How many kilometers is the difference between AB and ab by 10 kilometers
- 12. The walking speed ratio of a and B is 9:7. If a and B set out from a and B and walk in opposite directions respectively, they will meet after 0.5 hours. If they walk in the same direction, how many hours will it take a to catch up with B?
- 13. The speed ratio of the two vehicles is 5:7. After meeting, the two vehicles continue to run at the original speed Go ahead. When car B arrives at place a, car a is 48 kilometers away from place B. how many kilometers did car B travel after meeting
- 14. Two cars a and B leave from a and B at the same time. Two hours later, they meet at a distance of 15 kilometers from the midpoint, Find the distance between AB and two places
- 15. A car and a motorcycle run from a and B at the same time. After 4 hours, the two cars meet at a distance of 24 kilometers from the destination. It takes 9 hours for the car to complete the whole journey How many kilometers per hour
- 16. From city a to city B, it takes six hours for car a, and from city B to city a, it takes four hours for car B. now, car a and car B start from city a and city B at the same time, and travel opposite each other. When they meet, car a drives 96 kilometers. How far is the distance between city a and city B?
- 17. A and B two cars respectively from AB two opposite, after meeting a car in 4 hours to B, B car 1 hour to a, a and B two car speed ratio is
- 18. A and B drive from a city to B city respectively. A car goes from a city to B city, 10% of the whole journey per hour. B car goes from B city to a city, When car a is 260km away from city a, car B is 320km away from city B. what is the distance between city a and city B?
- 19. A and B are going from AB to B at the same time. They meet in 12 hours. After meeting, a goes to B in 8 hours and asks B to reach a in a few hours
- 20. At the same time, the two brothers walk from a and B, with a speed of 12.5km per hour and B speed of 10km per hour. They meet at a distance of 3.25km from the midpoint to seek the distance