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The length of the two trains a and B is 144m and 180m. Car a runs 4m more per second than car B. the two trains run opposite to each other, and it takes 9s from meeting to staggering. What is the speed of the two trains?
If vehicle B travels XM per second, then vehicle a Travels (x + 4) m per second,
According to the meaning of the question: 9 (x + X + 4) = 144 + 180,
Finishing: 2x = 32,
The solution is: x = 16,
Then vehicle a travels 20m per second and vehicle B travels 16m per second
The two trains of Party A and Party B start from the same city and run in opposite directions. The speed of train a is 36 km / h and that of train B is 48 km / h. It is known that train a leaves 2 hours earlier than train B How many hours did B catch up with a? emergency
Let's catch up with B after X hours
36（X+2）=48X
X=6
In fact, the topic is wrong. It is not opposite. It should be in the same direction. Opposite is opposite
The distance between railway stations a and B is 1280M. After the speed increase of "harmony" EMU, the train speed is 3.2 times of the original speed, and the distance from station a to station B is Continued: the time is shortened by 11 hours. What is the speed of the train after speed increase? (column equation)
Set the speed before acceleration as X and the current speed as 3.2X
1280/x-11=1280/3.2x
The solution is x = 80, so 3.2X = 256
I'm doing this, too. By the way
Two trains of 630 km from AB and B meet each other for 3 hours. It is known that the speed ratio of train a and B is 4:3. Calculate the speed of train B No equation
Speed and: 630 ÷ 3 = 210 (km / h)
Vehicle B speed: 210 ÷ (4 + 3) X3 = 90 (km / h)
The two trains leave from both places at the same time. The passenger car runs 65 kilometers per hour and the freight car runs 55 meters per hour. When they meet, the freight car runs 80 kilometers less than the passenger car What is the distance between the two places? Kilometer
Is it 55 meters or 55 kilometers?
80 / (65-55) = 8 hours (65 + 55) * 8 = 960km
A passenger car travels 78 kilometers in 3 / 4 hours and a freight car travels 80 kilometers in 2 / 3 hours. How many kilometers per hour is a passenger car slower than a train?
A passenger train runs 78km in 3 / 4 hours, and runs every hour:
78 ÷ 3 / 4 ＝ 104 (km)
A truck runs 80 kilometers in 2 / 3 hours. Every hour:
80 ÷ 2 / 3 ＝ 120 (km)
Passenger cars are slower than trains on average per hour:
120 － 104 ＝ 16 (km)
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