A and B cars are going from AB to ab at different speeds. They meet on the way. The meeting place is 70km away from B Online, etc The two cars of a and B travel from AB to ab at different speeds. They meet on the way. The meeting place is 70km away from B. after meeting, the two cars continue to advance at the same speed, return immediately after reaching the destination, and meet again on the way. At this time, the meeting place is 50km away from A. It is known that the time from the first meeting to the second meeting is 4 hours. How about the speed of the two cars?

A and B cars are going from AB to ab at different speeds. They meet on the way. The meeting place is 70km away from B Online, etc The two cars of a and B travel from AB to ab at different speeds. They meet on the way. The meeting place is 70km away from B. after meeting, the two cars continue to advance at the same speed, return immediately after reaching the destination, and meet again on the way. At this time, the meeting place is 50km away from A. It is known that the time from the first meeting to the second meeting is 4 hours. How about the speed of the two cars?

It can be seen from the conditions that car B travels 70x2 = 140 km in 4 hours, 140 △ 4 = 35 km per hour, and the distance between AB and ab is 70x3-50 = 160 km. Car a travels 160-70 = 90 km from the beginning to the first meeting, 90x2 = 180 km in 4 hours, and 180 △ 4 = 45 km per hour