The distance between city a and city B is 480 kilometers. An express train and a local train run from city a to city B at the same time. The express train runs 48 kilometers per hour and the local train 32 kilometers per hour. When the express train arrives at city B, it immediately returns to city a and meets the local train on the way. How many kilometers do the express train and the local train travel when they meet

The distance between city a and city B is 480 kilometers. An express train and a local train run from city a to city B at the same time. The express train runs 48 kilometers per hour and the local train 32 kilometers per hour. When the express train arrives at city B, it immediately returns to city a and meets the local train on the way. How many kilometers do the express train and the local train travel when they meet

Encounter time = (480 × 2) / (48 + 32) = 12 hours;
Express = 12 × 48 = 576km;
Slow train = 12 × 32 = 384km
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The distance between city a and city B is 760 km. An ordinary bus runs from city a to city B at 60 km per hour. An hour later, the express runs from city B to city a at 8 km per hour
80 km. The ordinary bus runs for several hours and meets the express

The correct answer to this question is:
（760-60*1）/(60+80)
=700/140
=5 hours
A: the two cars meet in five hours

The distance between the two cities is 565km. A slow train runs from city a to city B at 55km per hour. Two hours later, an express train runs from city B to city a at 75KM per hour. A few hours later, the two trains meet

Two hours later, the local train drove 55 * 2 = 110 km
Distance between local train and express train: 565-110 = 455km
Meeting time: 455 / (55 + 75) = 3.5 hours
That is, 3.5 hours after the express train leaves, the two trains meet

The distance between station a and station B is 480 km. A slow train departs from station a for 90 km per hour, and an express train departs from station B for 140 km per hour. (1) the slow train departs for one hour first, and the express train departs again. The two trains are facing each other. How many hours after the express train departs, the two trains meet? (2) How many hours after the two cars leave each other at the same time, the distance between them is 600 km? (3) The two trains leave at the same time, and the local train goes in the same direction behind the express train. How many hours later is the distance between the express train and the local train 600 km? (4) The two trains run in the same direction at the same time. The express train is behind the local train. How many hours later does the express train catch up with the local train? (5) One hour after the local train leaves, the two trains go in the same direction. The express train is behind the local train. How many hours after the express train leaves can it catch up with the local train?

(1) The express train starts out x hours after the train starts out, the express train starts out x hours, the two cars meet after hours, the 90 (x + 1 + 1) + 140x = 480, as is the 90 (x + 1 + 1 + 140x = 480x = 480, and the & nbsp; & nbsp & nbsp; & nbsp; & nbsp; & nbsp & nbsp; & nbsp & nbsp; & nbsp; & nbsp; & nbsp & nbsp; & nbsp & nbsp; & nbsp & nbsp & nbsp; & nbsp & nbsp; & nbsp & nbsp; & nbsp & nbsp & nbsp; & nbsp; & nbsp & nbsp & nbsp & nbsp; & nbsp; & nbsp & nbsp & nbsp & nbsp; & nbsp & nbsp; & nbsp; & nbsp & nbsp; & nbsp & nbsp & nbsp & nbsp & nbsp; & nbsp & nbsp; & nbsp; & nbsp & nbsp & nbsp & nbsp; & nbsp & nbsp & nbsp; & nbsp; & nbsp & nbsp & nbsp & nbsp & nbsp; & nbsp; & nbsp & nbsp; & nbsp; & nbsp; & nbsp; & nbsp & nbsp; & nbsp & nbsp; & nbsp & nbsp; & nbsp & nbsp & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp& nbsp; & nbsp; &A: the two trains meet after 3923 hours of the express train. (2) set a distance of 600 km (90 + 140) x + 480 = 600, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 230x = 600-480, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 120 △ 230, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; &Answer: after 1223 hours, the distance between the two trains is 600 km. (3) according to the meaning of the title, the distance of 600 km is the distance between the two trains when they leave at the same time plus 480 km between a and B. after X hours, the distance between the express train and the local train is 600 km, (140-90) x + 480 = 600, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 50x=600-480，            x=120÷50，            After 2.4 hours, the distance between the express train and the local train is 600 km, (4) after X hours, the express train catches up with the local train; According to the theme, the distance of the express train is one hour ahead of the local train + the distance of the local train and the express train at the same time + 480 km between a and B, 90 × (x + 1) + 480 = 140x, 90x + 90 + 480 = 140x, 140x-90x = 570, x = 570 △ 50, x = 11.4; a: the express train will catch up with the local train after 11.4 hours