⑵ Qp = Mn2x-50 = 3x-400x = 350 ﹙ m ﹚
(3) easy to know QP = 650m. QM = 550 When Xiao Ming set out, the distance between them was1250m. Chase 50 meters per minute
1250/50 = 25 minutes (after 25 minutes, Xiao Ming caught up with Xiao Hong for the first time.
At this time, Xiao Ming ran 25× 200 = 5000m.
5000 = 2× [2 | 650+550 |]+200 Xiaoming ran 200 meters twice. At this time, they are located at the edge of the rectangle PQ.