It takes 25 seconds for a train to pass through a 250 meter long tunnel and 23 seconds to pass through a 210 meter long tunnel. Q: does it take the train to miss another 320 meter long train with a speed of 64.8 kilometers per hour___ Seconds

It takes 25 seconds for a train to pass through a 250 meter long tunnel and 23 seconds to pass through a 210 meter long tunnel. Q: does it take the train to miss another 320 meter long train with a speed of 64.8 kilometers per hour___ Seconds

The speed: (250-210) / (25-23) = 20 (M / s), length: 25 × 20-250 = 250 (m), (64.8 km / h = 18 m / s), passing time: (250 + 320) / (20 + 18) = 15 (s). Answer: it takes 15 seconds for a train to pass by by by mistake

It takes 25 seconds for a train to pass through a 250 meter long tunnel and 23 seconds for a 210 meter long tunnel. If the train and another train are 150 meters long
How many seconds does it take for the trains with the speed of 108 km / h to pass by?

The speed of the train is (250-210) / (25-23) = 20m / s, and the length is 20 × 25-250 = 250m;
The other train has a speed of 108 km / h = 30 m / s and a length of 150 m,
Therefore, it takes (250 + 150) / (20 + 30) = 8 seconds for two trains to pass by

It takes 25 seconds for a train to pass a 250 meter long tunnel and 23 seconds for a 210 meter long railway bridge. If the train is in phase with another 150 meter long train with a speed of 20 meters per second
I'll say it again later: it takes a few seconds to pass by the wrong bus

Train
25-23 = 2 (seconds)
All right
250-210 = 40 (m)
Trains per second
40 △ 2 = 20 (m)
train conductor
20 × 25-250 = 250 (m)
It's necessary to pass by the wrong bus
(250 + 150) / (20 + 20) = 10 (seconds)