A passenger train runs 65 kilometers per hour from station a to station B, and a freight train runs 57 kilometers per hour from station B to station a at the same time A bus runs 65 kilometers per hour from station a to station B, and a truck runs 57 kilometers per hour from station B to station a at the same time. The two cars meet at the midpoint of 18 meters. How many kilometers is the distance between station a and station B?

A passenger train runs 65 kilometers per hour from station a to station B, and a freight train runs 57 kilometers per hour from station B to station a at the same time A bus runs 65 kilometers per hour from station a to station B, and a truck runs 57 kilometers per hour from station B to station a at the same time. The two cars meet at the midpoint of 18 meters. How many kilometers is the distance between station a and station B?

The speed ratio of the two cars is 65:57
So the distance is 65:57
Distance between the two places = 18 × 2 ÷ (65-57) × (65 + 57) = 549 km
A: the distance between the two places is 549 km

Passenger cars travel 65 kilometers per hour and freight cars 60 kilometers per hour. Passenger cars leave station a for 2 hours first, and freight cars leave station B for 4 hours. The two cars meet. How many kilometers is the distance between station a and station B?

Distance between station a and station B: 65 × 2 + (65 + 60) × 4, = 130 + 500, = 630 (km). Answer: the distance between station a and station B is 630 km

It is known that the speed of freight cars is 80 kilometers per hour, and the speed ratio of passenger cars to freight cars is 5:4
How many hours later did the two cars meet?

Bus speed = 80 △ 4 × 5 = 100 km / h
Encounter = 630 (80 + 100) = 3.5 hours

When a bus runs 80 kilometers per hour, the speed of the bus is 1 / 5 slower than that of the truck. What is the speed of the truck?

80 ÷ (1-1 / 5) = 100 km
A: the speed of the truck is 100 km / h