![](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>)
The distance between a and B is 639km. A passenger car and a freight car depart from the two places at the same time, facing two lines. It is known that the freight car travels 45km per hour, and the speed of the passenger car is the same as that of the freight car The speed of the bus is 1.2 times that of the truck. How many hours after the bus leaves, will the two cars meet?
It takes x hours
therefore
45x+45×1.2x=639
45x+54x=639
99x=639
x≈6.45
It takes 6.45 hours
A and B start from two places at the same time. A travels 120 kilometers per hour and B travels 100 kilometers per hour. The distance ratio between them when they meet is (): ()
The time ratio for each of them to complete the journey is (): ()
A and B start from two places at the same time. A travels 120 kilometers per hour, B travels 100 kilometers per hour. The distance ratio when they meet (6): (5)
The time ratio for each of them to complete the journey is (5): (6)
Car a and car B leave from city a and city B respectively. Car a travels 36km per hour. The two cars meet 4 hours later. When they meet, how far does car a and car B travel
The ratio is 6:5
The same time, speed ratio = distance ratio = 6:5
So car B runs 36 △ 6 × 5 = 30 km per hour
Have a good time
Party A and Party B are walking towards each other from AB, 36km away. If Party A goes 2 hours ahead of Party B, they will meet after 2.5 hours of Party B's departure. If Party B goes 2 hours ahead of Party A, they will meet after 3 hours of Party A's advance and ask for the speed (process) of Party A and Party B to help
Let a speed be XKM / h and B speed be YKM / h
4.5x+2.5y=36,①
3x+5y=36.②
①-②,1.5x-2.5y=0,y=3x/5,③
Substituting 3 into 2, 6x = 36, x = 6,
3, y = 3.6
RELATED INFORMATIONS
- 1. A and B set out at the same time from two places 36km apart, and they meet each other after 4 hours and 30 minutes. If B walks for 2 hours first, then a sets out again, a will meet B after 3 hours and 40 minutes, and then find out the speed of a and B
- 2. A. B is 36km away from the two places. If a and B both go from a to B, B goes 2 hours ahead of a, and a catches up with B after 4 hours; if a and B go from a and B respectively B starts 1.5 hours earlier than a. the two meet 3 hours after a starts. How many km do a and B walk each hour Let a be XKM per hour and B YKM per hour Brace form: {x.y.} {x.y.}
- 3. At 8:00 a.m., a and B are facing each other at the same time. The distance between a and B is 36 kilometers at 10:00 a.m., and they continue to move forward. At 12:00 a.m., they are 36 kilometers apart. It is known that a walks 2 kilometers more than B every hour, so as to find the distance between a and B
- 4. Party A and Party B start from the East and West cities at the same time. They can meet each other in 10 hours. In fact, it takes 4 hours A and B set out from the East and West cities at the same time, facing each other. After 10 hours, they can meet on the way. In fact, 4 hours later, a stopped on the way, and B walked for another 12 hours to meet A. how many hours does it take for B to finish the journey alone? PS: no scattering of equations OK
- 5. A and B start from the East and West cities at the same time, and run in opposite directions. They meet in 6 hours. If the speed of the two vehicles increases by 6 kilometers, they meet in 5.4 hours How many kilometers?
- 6. A and B are going from a and B at the same time. They meet 4.8 hours later. It is known that it takes 12 hours for a to go from a to B, and B to go from B to a How many hours does it take? And right!
- 7. The distance between AB and a is 600 km. The two vehicles of a and B travel from ab at the same time. They can meet each other in 12 hours. However, if a runs for 2 hours and B runs for 3 hours So they can only travel 1 / 5 of the whole journey. How long does it take to complete the whole journey alone?
- 8. There are 195 cars in the two stations. If 36 cars are driven from station a to station B and 45 cars are driven from station B, the number of cars in station B is twice that in station A. how many cars are there in station a and station B?
- 9. The two cars run from a and B for 5 hours. The distance ratio is 3:2. How many hours does it take to finish the whole journey?
- 10. Car a and car B start from a and B at the same time and travel in opposite directions. Car a travels 80 kilometers per hour and car B 70 kilometers per hour. When car a reaches 25 o'clock of the whole journey, car B is 36 kilometers away from the midpoint. How many kilometers is the distance between a and B?
- 11. The passenger car and the freight car leave from station a and station B at the same time. The passenger car travels 54 kilometers per hour and the freight car 48 kilometers per hour. After the two cars meet, they continue to move forward at the original speed. The passenger car returns immediately after arriving at station B, and the freight car also returns immediately after arriving at station A. when the two cars meet again, the passenger car travels 216 kilometers more than the freight car
- 12. The distance between Party A and Party B is 400km. The express train runs 64km per hour and the local train 36km per hour. The distance between the two trains is 150km after a few hours of departure from Party A and Party B at the same time
- 13. If you use the same car to transport the goods out of the warehouse, if you use four cars a day, it will be finished in nine days; if you use five cars a day, it will be finished in six days. If you use one car to transport the original inventory in the warehouse, how many days will it take?
- 14. Two cars set out from a certain place at the same time to transport a batch of goods to the construction site 160 kilometers away. Car a arrived 0.8 hours earlier than car B, Two cars set out from a certain place at the same time to transport a batch of goods to the construction site 160 km away. Car a arrived 48 minutes earlier than car B. when car a arrived at the destination, car B was 24 km away from the destination. How many hours did car a spend on the whole journey?
- 15. Two cars set out from a certain place at the same time to transport a batch of goods to the construction site 165 kilometers away. Car a arrived 18 minutes earlier than car B. when car a arrived, car B returned
- 16. Two cars set out from a certain place at the same time to transport a batch of goods to the construction site 165 kilometers away. Car a arrived 48 minutes earlier than car B. when car a arrived, car B was 24 kilometers away from the construction site. How many hours did car a spend on the whole journey?
- 17. There are 120 people in the two engineering teams, of which the number of team B is three times less than that of team A. how many people are there in each team?
- 18. Team a and team B work together to build a 240 km long road. Team a works alone for 10 days, and a pair works alone for 15 days. How many days will the two teams work together? There are two solutions,
- 19. It will take 15 days for team a to build a road, 12 days for team B to build it alone, six days for team a to build it first, and the rest will be jointly built by team a and team B. how many days will it take for team a and team B to build it together?
- 20. For a section of highway, it will take 15 days for engineering team a alone, 20 days for engineering team B alone, and there are 2600 meters left after 3 days of construction by both teams. How many meters are there in this section of highway?