Two cars drive from city a to city B at the same time. Their speed is 70km / h and 55km / h respectively. Six hours later, how far is the distance between the two cars? It is calculated by two methods Two ways!

70x6-55x6
=420-330
=90 km
（70-55）x6
=15x6
=90 km

How many kilometers is the distance between a and B

This is a standard encounter problem
From "12 kilometers less than passenger cars per hour", we know that the speed of freight cars is 60-12 = 48 km / h. using the formula of encounter problem, the distance is equal to (60 + 48) * 5 = 540 km

RELATED INFORMATIONS

1. When a car goes from a to B, the speed is 60 km / h for going and 80 km / h for coming back. The average speed for going back and forth is 70 km / h
2. Party A and Party B set out from AB and head for each other. When they met, Party A traveled 55% of the whole journey, 3.5 kilometers more, and Party B just walked 1.2% of the route of Party A How many kilometers did B travel when they met? Don't use complicated equations, especially for quadratic equations with 2 variables. It's better to write the meaning of each step in the formula
3. The application of one variable linear equation -- the encounter problem of journey: a passenger car and a freight car leave from two cities 1000 km apart at the same time, and after 4.5 hours, the two cars are still 55 km apart. It is known that the speed of the passenger car is 1 / 3 faster than that of the freight car. How much is the speed of the passenger car and the freight car? (solved by one variable linear equation)
4. The distance between a and B is 108 km. How many hours does it take for a car to arrive from a city to B city at the speed of 15 m / S?
5. A car from a to B, 40 kilometers per hour, return, 60 kilometers per hour, the average speed of the car back and forth?
6. The average speed of a bus from place a to place B is 60 km / h and that of a bus from place a to place B is 40 km / h
7. A car goes from place a to place B at the speed of 40 kilometers per hour. After arriving at place B, it returns to place a from the original road at the speed of 60 kilometers per hour. What is the average speed of this car?
8. The speed of a car going up the mountain from a to B is 30km / h, and the speed going down the mountain is 42km / h. find the average speed of the car going up and down the mountain
9. A mountain road is 15 kilometers long. A car goes up the mountain 30 kilometers per hour, and goes down the mountain 50 kilometers per hour from the original road
10. A car goes up the mountain along a road at a speed of 10km / h, and goes down the mountain from the original road at a speed of 20km / h. The average speed of the car going up and down the mountain is () A. 403km/hB. 12.5km/hC. 14.5km/hD. 15km/h
11. A. The distance between B and a is 150 kilometers. The speed of car a is 55 kilometers per hour, and that of car B is 45 kilometers per hour. If two cars go in the same direction from a and B (car a is behind car B), how long does it take for car a to catch up with car B? Let X
12. A car travels 55 kilometers per hour. It takes seven tenths of an hour from a to B. how many kilometers are there between a and B?
13. Two cars are running from two places 400 kilometers apart at the same time. Three hours later, they are 10 kilometers apart. It is known that one car runs 55 kilometers per hour. How can we find the speed of the other car? (answer in two ways)
14. The distance between a and B is 274 kilometers. A bus runs 95 kilometers per hour from a place. After a period of time, it is 84 kilometers away from B place. How many hours has this bus been running?
15. Urgent need Solving practical problems with equations: the total length of the expressway from Shanghai to Nanjing is 274 km. A bus from Shanghai to Nanjing runs 54 km less in the first 1.2 hours than in the second 1.8 hours. What is the speed of the two buses per kilometer?
16. Driving from Shanghai to Nanjing, the original plan was to arrive at 11:30 noon, but after starting, the speed of the car increased by 1 / 7, so it arrived at 11:00. When returning the next day, it started from Nanjing at the same time, drove 120 km at the original speed, then increased the speed by 1 / 6, and arrived in Shanghai at 11:10. What is the distance between Shanghai and Nanjing?
17. A car set out for the mountain area, traveling 42km per hour, and arrived in 6 / 7 hours. It only took 3 / 4 hours to return from the original road (Continued) how many kilometers per hour is the average return time?
18. A car delivers goods to the mountain area, 42 kilometers per hour, 67 hours to arrive. It only takes 34 hours to return from the original road, how many kilometers per hour on average?
19. The bus stop is the starting point of No.1 bus and No.5 bus. After the first bus leaves at 6 a.m., No.1 bus leaves every 15 minutes No.5 bus leaves every 12 minutes. At least how long does it take for two buses to leave at the same time?
20. No.1 and No.2 buses leave from the starting station at 6:00 in the morning. No.1 bus leaves every 6 minutes, and No.2 bus leaves every 9 minutes After these two buses start at the same time, how many minutes will they start at the same time?