When the express train reaches one third of the whole journey, the slow train runs for 60 kilometers, and when the express train reaches the second place, the speed of the train will be increased, If the speed of the two cars keeps the same in the process of driving, how many kilometers is the distance between a and B? 60×3＝180 What do you mean 180 △ 90% = 200

When the express train reaches one third of the whole journey, the slow train runs for 60 kilometers, and when the express train reaches the second place, the speed of the train will be increased, If the speed of the two cars keeps the same in the process of driving, how many kilometers is the distance between a and B? 60×3＝180 What do you mean 180 △ 90% = 200

The fast train runs to one third of the whole journey, and the slow train runs for 60 km
The remaining two-thirds of slow cars travel 120 kilometers
The local train runs a total of 180 km, or 90% of the total length
Total length = 180 ／ 90% = 200

When the express train runs half the way, the slow train runs 40km; when the express train reaches the second place, the slow train runs 40km
It's still one fifth of the total distance, which is () km

40*2=80
80/5/4=100
80 divided by 4 / 5 = 100, which is absolutely right