A and B set out from a and B respectively and went opposite each other. When they met, 55% of a's journey was more than 3.5 kilometers. B just walked 12 times of a's journey. How many kilometers did B travel when they met?

A and B set out from a and B respectively and went opposite each other. When they met, 55% of a's journey was more than 3.5 kilometers. B just walked 12 times of a's journey. How many kilometers did B travel when they met?

3.5 △ (21 + 2-55%) × 13, = 3.5 △ (23-1120) × 13, = 3.5 △ 760 × 13, = 3.5 × 607 × 13, = 10 (km); a: B traveled 10 km when he met

A and B depart from a and B at the same time. For the first time, they meet 75 km away from A. after meeting, they continue to move forward and return to their destination. For the second time, they meet 55 km away from B. A and B are far away from each other______ Kilometers

75 × 3 = 225 (km), 225-55 = 170 (km)