✔ 最佳答案
Since 300分之1 秒行 3.15公里
Therefore: 1 秒行 3.15 x 300
=945 km
So the velocity is 945 km / s
As 1 hour = 60 min x 60 second
So there is 3600 second in one hour
So distance travel by 1hour
= 945 km/s x 3600 s
= 3402000 km
5km每小時,1秒可走多少米?
So the velocity is 5 km / hour
Since 1 km = 1000m
1 hour = 3600 s
Therefore 5 km / hour = (5 x 1000) m / 3600 s
= 5 / 3.6
= 1.39 m/s ( Corr. to 3 sig. fig.)
In general, there is a short cut to change
km/ hour --> m/s
Simply divide it by 3.6
As km/hour = 1000m/3600s
Therefore 1 km/hour = 1/3.6 m/s
Hope that can help you to calculate much faster.
:)