Xiao Lin and Xiao Gang quarrel loudly in the self-study class for a small matter At this time, the monitor said: "a you have a bad influence on such a loud quarrel. B you have a bad influence on such a loud quarrel. Aren't you ashamed? C you have a bad influence on such a loud quarrel. D you have a great influence on such a loud quarrel

Xiao Lin and Xiao Gang quarrel loudly in the self-study class for a small matter At this time, the monitor said: "a you have a bad influence on such a loud quarrel. B you have a bad influence on such a loud quarrel. Aren't you ashamed? C you have a bad influence on such a loud quarrel. D you have a great influence on such a loud quarrel

What do you want me to answer

In the 100 meter race, Xiaoming's result is 19 seconds, Xiaogang's speed is 20 seconds, and the speed ratio between Xiaoming and Xiaogang is 20:19. Is it right or wrong?

Xiaogang's speed is 20 seconds Speed in meters per second
19/100:20/100
19:20

It took 8 seconds for Xiaoming to run 40 meters and 10 seconds for Xiaogang to run 60 meters. Who runs fast?

40 / 8 = 5 (m)
60 / 10 = 6 (m)
5m < 6M
A: Xiaogang is fast

Xiao Ming, a timekeeper at the end of the 100 meter race, starts to count the time when he hears the gunshot at the start of the 100 meter race. If the temperature is 15 ° C at that time, how long does it take for the gunshot from the start to reach the end? If Xiao Ming measures that an athlete's score is 12 seconds, what is the actual score of the athlete?

t=S/v=100m/340m/s=0.29s
Score = 12 + 0.29 = 12.29s