A train from a city to B city, 2 hours 190 kilometers, according to the speed of 6 kilometers to B city, find the distance between a and B cities Oh, six more hours

The distance between city a and city B is x km
2+6：X=2：190
8：X=2：190
2X=8*190
X=760
The distance between the two cities is 760 km

S a train from a certain place to Qingdao, at the speed of 80 kilometers per hour for three hours, at this time, the train has exceeded the end of the whole journey by 40 kilometers, how much more time will it take to finish the whole journey

The midpoint distance is 80 * 3-40 = 200 km
400-240 = 160 km left
160 / 80 = 2 hours

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