5. On one side of the road, some power poles are arranged at equal distances. Xiao Ming rides his bike along the road. He took 3 minutes to ride from the 1st power pole to the 10th power pole. At this speed, in another 3 minutes, Xiao Ming can ride to the $\qquad$th power pole.
【Analysis】From the 1st pole to the 10th pole, it took 3 minutes, covering 9 intervals, so walking for another 3 minutes still covers 9 intervals. 10+9=19, which means riding to the 19th.