54km/h=( )=( )=( )m/s

题目

54km/h=( )=( )=( )m/s
15m/s=( )=( )=( )km/s
7200km/h=( )=( )=( )m/s
0.5m/s=( )=( )=( )km/h
要求以这种方式求(u=s/t=100m/17s=5.9m/s)

答案

=54000/3600=15
15/1000
= -------=54
1/3600
=7200000/3600=2000
0.5/1000
= -------- =1.8
1/3600