The distance between the enemy and us is 5km, the enemy escapes at a speed of 5km/h, our army pursues at a speed of 8km/h, and a battle occurs at a distance of 1km. Q: How many hours after the chase started? It's 28 kilometers from the school to the county seat. Besides taking the bus, it's a long walk. The bus speed is 36km/h, the walking speed is 4km/h, and the whole journey is1h. How long is the walking time? On a double-track railway, two trains passed head-on. The speed of train A is 20m/s and the speed of train B is 25m/s. If the total length of train A is 200m and the total length of train B is 160m, how long will the two trains miss each other? S 1。 Solution: Let's catch up with the enemy 8X-5X=5 3X=5 X=5/3 1 divided by 8 =1/85/3-1/8 = 37/242. Solution: Let's set xh4x+36 as walking.

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