Kobayashi and Xiaogang run the 100 meter race. It is known that Kobayashi runs 1 meter in the first second and then runs 0.1 meter more than the previous second. Xiaogang runs at the speed of 1.5 meters per second all the time. Who can win? Come on, help me do it

Kobayashi and Xiaogang run the 100 meter race. It is known that Kobayashi runs 1 meter in the first second and then runs 0.1 meter more than the previous second. Xiaogang runs at the speed of 1.5 meters per second all the time. Who can win? Come on, help me do it

Kobayashi
It takes Xiaogang 66.66 seconds to reach the finish line
Xiaolin can run 217.8 meters in 66 seconds

Xiaoqiang is one tenth slower than Xiaogang. Xiaogang is one tenth slower than Kobayashi

Suppose Xiaogang's speed is 10 meters per second
Xiaoqiang is one tenth slower than Xiaogang
So Xiaoqiang is 9 meters per second
Xiaogang is one tenth slower than Kobayashi
So Kobayashi is 11 meters per second
Xiaoqiang, Xiaogang and Xiaolin are 9, 10 and 11 respectively

At the sports meeting, Xiaogang, Xiaoqiang and Xiaolin ran together. In the same time, Xiaogang ran 7 / 8 of the whole race, Xiaoqiang ran 8 / 9 of the whole race, and Xiaolin ran 17 / 18 of the whole race. Who ran the fastest

The speed of Kobayashi is the fastest because of the same time and distance, 17 / 18 > 8 / 9 > 7 / 8