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The length of the fast and slow trains are 150 meters and 200 meters respectively. They run on parallel tracks in opposite directions. If people on the slow train see the fast train passing the window, the time is 6 minutes Second, how many seconds does it take for people on the express to see the local train passing the window? Why?
First of all, find the relative speed of the two trains. If the slow train looks at the fast train for 6 seconds, set the slow train to be stationary. Then the relative speed = the length of the fast train / 6 = 150 / 6 = 25m / s
Then the express driver looks at the slow train, and sets the fast train to be stationary, and the relative speed is still 25m / s, then the time = slow train length / relative speed = 200 / 25 = 8 seconds
An express train is 160 meters long and a local train is 170 meters long. If the two trains are running in opposite directions, it will take 5 seconds for them to run into each other and leave. If the two trains are running in opposite directions, they will catch up with each other
It takes 33 seconds for the slow train to leave the slow train completely. Find the speed of the fast train and the slow train
Assuming that the fast train speed is x m / s and the slow train speed is Y M / s, then: 33x-33y = 160 + 170; 5x + 5Y = 160 + 170; solving the equation can get: x = 38, y = 28
An express train is 306 meters long, and a slow train is 344 meters long. The two trains are facing each other, and it takes 13 seconds from meeting to leaving. If a car leads to it, the express train will catch up with the slow train
Go in opposite directions
(fast train length + slow train length) / (fast train speed + slow train speed) = 13 seconds
Go in the same direction
(fast train length + slow train length) / (fast train speed - slow train speed) = required time
An express train and a local train run in opposite directions. The length of the express train is 280 meters, and that of the local train is 385 meters. The time for people sitting on the express train to see the local train passing is 11 seconds, so the time for people sitting on the local train to see the express train passing is 11 seconds______ Seconds
The relative speed of the two trains is: 385 △ 11 = 35 (M / s); the time for people on the slow train to see the fast train passing is: 280 △ 35 = 8 (s)
RELATED INFORMATIONS
- 1. The two trains are facing each other. The express is 280 meters long and the local is 385 meters long. People sitting on the express watch the local run for 11 seconds
- 2. An express train and a local train run in opposite directions. The length of the express train is 280 meters, and that of the local train is 385 meters. The time for people sitting on the express train to see the local train passing is 11 seconds, so the time for people sitting on the local train to see the express train passing is 11 seconds______ Seconds
- 3. 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)
- 4. 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?
- 5. The speed of the full train is two-thirds of that of the express train. The two trains meet each other six hours after leaving and continue to move forward. The express train is several hours earlier than the slow train
- 6. The length of the railway from a to B is about 1464 kilometers. A fast train from a to B takes five twelfth of the whole journey in five hours. How many kilometers are there from B?
- 7. The railway from a to B is 675km long. A train leaves from a to B at 5:30pm on the first day, with an average of 45km per hour When does the train arrive at B?
- 8. The railway from a to B is 700 kilometers long. A train leaves from a to B at 5:30 p.m. on the first day. The average train runs 200 kilometers per hour. When is the train Waiting to get to B?
- 9. For the sixth time, the train increased its speed from 180 km / h
- 10. When China's train speed was raised for the sixth time, the average train speed was increased from 160 km / h to 200 km / h, an increase of 10%
- 11. An express train is 160 meters long, and a local train is 170 meters long. If two trains are running in opposite directions, it takes 33 seconds to catch up with the local train from the express train
- 12. 11. An express train and a local train run in opposite directions. The length of the express train is 280 meters and the length of the local train is 385 meters. It takes one hour for people sitting on the express train to see the local train How many seconds does it take for people on the local train to see the express passing?
- 13. The length of the express train is 70 meters and the length of the local train is 80 meters. If two trains go in the same direction, the time it takes for the express train to catch up with the local train and leave the local train completely A fast train is 70 meters long and a slow train is 80 meters long. If two trains are running in the same direction, it takes 20 seconds for the fast train to catch up with the slow train and completely leave the slow train. If two trains are running in the opposite direction, the time from meeting to leaving is 4 seconds. How many kilometers per hour can the two trains travel? It must be solved by equation
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- 15. Naughty goes to school by bike every day. The outer diameter of the bicycle tire is 60cm It takes him 8 minutes to get to school. Do you know how far the naughty home is from school?
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- 20. A correspondent rides a motorcycle to deliver the documents within the prescribed time. His speed is 36 kilometers per hour. As a result, he arrives 20 minutes earlier. If he is 30 kilometers per hour, he is 12 minutes late? What's the distance?