Party A and Party B ride from both places at the same time. Party A travels 20 kilometers per hour, and Party B travels 18 kilometers per hour. When they meet, the distance between them is 3 kilometers from the midpoint of the whole journey. How long is the whole journey? (draw a picture first, then answer)

Party A and Party B ride from both places at the same time. Party A travels 20 kilometers per hour, and Party B travels 18 kilometers per hour. When they meet, the distance between them is 3 kilometers from the midpoint of the whole journey. How long is the whole journey? (draw a picture first, then answer)

3 × 2 (20-18) = 6 △ 2 = 3 (hours); (20 + 18) × 3 = 38 × 3 = 114 (kilometers); answer: the whole journey is 114 kilometers long

Party A and Party B ride from both places at the same time. Party A travels 20 kilometers per hour, and Party B travels 18 kilometers per hour. When they meet, the distance between them is 3 kilometers from the midpoint of the whole journey. How long is the whole journey? (draw a picture first, then answer)

3 × 2 (20-18) = 6 △ 2 = 3 (hours); (20 + 18) × 3 = 38 × 3 = 114 (kilometers); answer: the whole journey is 114 kilometers long