One train goes from place a to place B at a speed of 40 kilometers per hour; one hour later, the other train stops It also goes from place a to place B at a speed of 50 kilometers per hour. As a result, the two trains arrive at the same time. How many kilometers are there between a and B?

One train goes from place a to place B at a speed of 40 kilometers per hour; one hour later, the other train stops It also goes from place a to place B at a speed of 50 kilometers per hour. As a result, the two trains arrive at the same time. How many kilometers are there between a and B?

40*X=（X-1）*50
The above x is the time of the previous car
You can also set X as the distance
X / 40 = x / 50 + 1 is the distance

A train from a to B, the speed is 40 kilometers per hour, an hour later another train from a to B, the speed is 50 kilometers per hour, the result arrived at the same time. How many kilometers between the two cities

200
If the arrival time of the previous train is x hours, then
40X=50(X-1),
X=5,
So, the distance is 200 kilometers

A train from a to B, the original plan speed is 90 kilometers per hour, but when the voyage to half due to heavy rain, the train stopped at a small station for 12 minutes, the driver decisively speed up the train 10 kilometers per hour, so just on time to B, ask the distance between the two stations

The distance between station a and station B is x km
½x／90=½x／﹙90＋10﹚＋12／60
x=360