During the National Day holiday, Xiao Ming traveled by train with Li Zhi, who loves brains. They plan to do an activity to measure the train speed while watching the scenery outside the car on the roa

During the National Day holiday, Xiao Ming traveled by train with Li Zhi, who loves brains. They plan to do an activity to measure the train speed while watching the scenery outside the car on the road. According to the question, the length of the bus:

L =11m× 2.2×17 = 411.4m, and the elapsed time is t=8s.

Xiao Ming's speed relative to the bus:

v = v 1+v2 = v 1+ 108km/h = v 1+30m/s，

∫L =(v 1+v 2)t =(v 1+30m/s)×8s，

Namely: 411.4m = (v1+30m/s) × 8s,

∴v 1 ≈2 1.4m/s

So the answer is: 2 1.4.