It takes 25 seconds for a train to pass a 250 meter long tunnel and 23 seconds to pass a 210 meter long railway bridge (1) (2) if the train is 150 meters longer than another train with a speed of 72 kilometers per hour, how many seconds will it take for the two trains to pass by when they meet?

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• 1. 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. If the train meets another 150 meter long train with a speed of 72 km / h, it will be necessary for the train to miss______ second?
• 2. Nanjing Yangtze River Bridge and Wuhan Yangtze River Bridge, which is the first bridge in China
• 3. A 120 meter long train passes the 880 meter long bridge at a speed of 50 km / h. how many seconds does it take for the train to get on and leave the bridge?
• 4. A 700 meter long train passes a 900 meter long bridge at a speed of 400 meters per minute______ Minutes
• 5. A train is 700 meters long, passing through a bridge at the speed of 400 meters per minute. It takes 5 minutes from the front of the train to the rear of the train. How long is the bridge?
• 6. A bridge is 1000 meters long, a train is 80 meters long, and the speed is 50 m / s In a hurry Solving linear equation with one variable
• 7. A bridge is 500 meters long. It takes one minute for a train to get on the bridge from the front to the rear. The time for the whole train to be completely on the bridge is 50 seconds Length?
• 8. A 210 meter long train passes a 900 meter long bridge at a speed of 30 meters per second. How long does it take for the train to pass the bridge completely?
• 9. A train passes a 900 meter long railway bridge. It takes 1 minute and 25 seconds from the front of the train to the rear of the train to leave the bridge. Then the train goes through a 1800 meter long tunnel. It takes 2 minutes and 40 seconds from the front of the train to the rear of the train to leave the tunnel
• 10. It takes 40 seconds for a train to cross the 530 meter cave and 30 seconds for a train to cross the 380 meter bridge at the same speed What's the speed of this train? How long is its body?
• 11. 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
• 12. It takes 45 seconds for a bus to cross the 8640 meter long bridge and 35 seconds for it to cross the 610 meter long tunnel at the same speed
• 13. It takes 24 seconds for a train to pass through the first tunnel of 500 meters, and then it takes 16 seconds to pass through the second tunnel of 216 meters?
• 14. It took 24 seconds for a train to cross the 360 meter long railway bridge, and 16 seconds for a train to cross the 216 meter long railway bridge at the same speed______ Rice
• 15. It takes 19 seconds for a train to pass a 450 meter long bridge and 30 seconds to pass a 780 meter long tunnel at the same speed
• 16. A bridge is 4200m long and a train is 600m long. It passes through the bridge at the speed of 1200m per minute. How long does it take from the front of the train to the rear of the train to leave the bridge?
• 17. A 120m long train passes through a 180m long bridge in 12s,
• 18. How many seconds does it take for a 300m long train to pass through a 2000m long tunnel at the speed of 72km / h, and how long does it take for the whole train to pass through the tunnel
• 19. The bridge is 1000 meters long. It takes one minute for a train to get on the bridge from the front to the rear. The time for the whole train to be completely on the bridge is 40 seconds
• 20. It takes 20 seconds for a train to run at a constant speed through a 450m long tunnel. There is a light on the tunnel, and the time for the light to shine on the train is 5S Ask: (1) the length of the train; (2) the time that the train runs completely in the tunnel There is a light in the tunnel. The time that the light shines on the train is 5S. What do you mean///////