A car and a truck drive from a and B at the same time. The speed of the car is 55 kilometers per hour, The speed of the truck is 45 kilometers per hour, and it meets at 20 kilometers from the midpoint. How many kilometers is the distance between a and B? I'm going to report soon!

A car and a truck drive from a and B at the same time. The speed of the car is 55 kilometers per hour, The speed of the truck is 45 kilometers per hour, and it meets at 20 kilometers from the midpoint. How many kilometers is the distance between a and B? I'm going to report soon!

The distance between a and B is (55 + 45) * 4 = 400 km
Do you understand?
Add: the first floor is wrong. A walks 40 kilometers more than B. If you don't believe in drawing, you will know