The bus runs B kilometers per hour and the car runs a kilometers per hour. The two cars start from AB and run opposite each other at the same time. After 2.5 hours, what is the distance between the two places? Using equation

The bus runs B kilometers per hour and the car runs a kilometers per hour. The two cars start from AB and run opposite each other at the same time. After 2.5 hours, what is the distance between the two places? Using equation

It's a meeting problem
In the meeting problem, the time from departure to meeting is the same, that is, the meeting time is 2.5 hours
The distance between the two places is the speed of the two cars multiplied by the time of meeting
（A+B）×2.5

Passenger cars and freight cars run from two places at the same time and meet at the place 24 kilometers away from the midpoint. At this time, the distance ratio of the two cars is 4:3. How many kilometers are the two places apart?

You can draw a line diagram first, and then take a look at my formula. That is to say, the distance ratio of car a and car B is 4:3, and the bus is 4-3 = 1 more than the truck. From the line diagram, we can see that car B is 24x2 = 48 (km) more than car a, and the 48 km just corresponds to the above 1, That is to say, a share of 48 (km) is the total distance between a and B. the share of 4 + 3 = 7 A and B is 48x7 = 336 (km)