The distance between a and B is 540 km. A truck and a bus run from a and B at the same time. The truck runs 65 km per hour and the bus 55 km per hour After several hours of meeting, how many kilometers did the bus travel when they met

The distance between a and B is 540 km. A truck and a bus run from a and B at the same time. The truck runs 65 km per hour and the bus 55 km per hour After several hours of meeting, how many kilometers did the bus travel when they met

540 / (65 + 55) = 4.5 (hours)
55 * 4.5 = 247.5 (km)

The distance between the two cities is 630 km. A passenger train and a freight train leave the two cities at the same time. The speed of the passenger train is 56 km,

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The distance between the two cities is 630 km. A passenger train and a freight train leave the two cities at the same time. The speed of the passenger train is 56 km, and the speed of the freight train is the same as that of the passenger train
Seven out of eight. The two cars met a few hours after they left

Truck speed = 56 △ 7 / 8 = 64 km / h
Distance = 630 (56 + 64) = 5.25 hours