Party A and Party B travel from ab at the same time. Party A completes the whole journey for 6 hours. When they meet, the ratio of the distance they travel is 3:2. At this time, Party A travels 18 kilometers more than Party B Party A and Party B travel from AB to ab at the same time. It takes 6 hours for Party A to complete the whole journey. When they meet, the ratio of the distance they travel is 3:2. At this time, Party A travels 18 kilometers more than Party B, so as to find the speed of Party B

Party A and Party B travel from ab at the same time. Party A completes the whole journey for 6 hours. When they meet, the ratio of the distance they travel is 3:2. At this time, Party A travels 18 kilometers more than Party B Party A and Party B travel from AB to ab at the same time. It takes 6 hours for Party A to complete the whole journey. When they meet, the ratio of the distance they travel is 3:2. At this time, Party A travels 18 kilometers more than Party B, so as to find the speed of Party B

Speed ratio = distance ratio = 3:2
Time ratio of two people = 1 / 3:1 / 2 = 2:3
B: 6 * 3 / 2 = 9 hours
The meeting time of the two people = 1 ÷ (1 / 6 + 1 / 9) = 3.6 hours
Speed difference between two persons = 18 △ 3.6 = 5km / h
B speed = 5 △ (3-2) × 2 = 10 km / h