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The express train and the local train run from a and B at the same time. After meeting for 3 hours, the two trains continue to move forward at the original speed. The express train runs for 2 hours and reaches B. at this time, the train stops at the same time How many kilometers is the distance between a and B? (arithmetic)
A. B distance
=（360÷5＋360÷5÷2×3）×3
=（72＋108）×3
=180×3
=540km
It is known that the speed ratio of express train and local train is 5:4, and the distance between two places is shorter
After meeting, the two trains continued to move forward. When the local train reached the midpoint of the two places, how many kilometers did the express train travel?
When they meet, the two trains complete the whole journey together. The express train takes 5 / (5 + 4) = 5 / 9 of the whole journey, and the local train takes 4 / (5 + 4) = 4 / 9 of the whole journey. The express train takes 5 / 9-4 / 9 = 1 / 9 more than the local train, and the 2 * 24 = 48 km is the 1 / 9, so the whole journey is 48 / (1 / 9) = 432 km
When the local train takes 1 / 2 of the whole journey, the express train takes 1 / 2 * 5 / 4 = 5 / 8, that is 432 * 5 / 8 = 270 km
The fast and slow trains leave from a and B at the same time and meet each other after 5 hours. After meeting, the two trains continue to drive at the original speed and arrive at B after 3 hours. The slow train is 180 km away from A. how long is the highway between a and B?
The whole journey of express train takes 5 + 3 = 8 (hours). After the two trains meet, the distance of express train takes up 3 △ 8 = 38 of the whole journey, the distance of slow train takes up 38 △ 5 = 340 of the whole journey, and the distance of slow train takes up 340 × 8 = 35 of the whole journey. The highway length of a and B is 180 △ 1-35, = 180 △ 25, = 450 (km). Answer: the highway length of a and B is 450 km
The fast and slow trains leave from a and B at the same time and meet each other after 5 hours. After meeting, the two trains continue to drive at the original speed and arrive at B after 3 hours. The slow train is 180 km away from A. how long is the highway between a and B?
The whole journey of express train takes 5 + 3 = 8 (hours). After the two trains meet, the distance of express train takes up 3 △ 8 = 38 of the whole journey, the distance of slow train takes up 38 △ 5 = 340 of the whole journey, and the distance of slow train takes up 340 × 8 = 35 of the whole journey. The highway length of a and B is 180 △ 1-35, = 180 △ 25, = 450 (km). Answer: the highway length of a and B is 450 km
RELATED INFORMATIONS
- 1. A and B leave from a and B at the same time. After 5 hours, they meet each other and continue to move forward. After 3 hours, a arrives at B. at this time, B is 240 kilometers away from A. how many kilometers are there between a and B?
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