30km/h= m/s

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30km/h= m/s
30km/h= m/s

30km/h= m/s
1km=1000m 1h=3600s
所以1km/h=(1000/3600)m/s=(10/36)m/s
30km/h=30*10/36=8.3/s

30km/h=30*1000m/3600s=30000m/3600s=8.3m/s

30km/h=（30000m）/（3600s）=25/3（m/s）

30*1000/3600=(25/3)m/s

30km/h=30000m/h=30000m/(3600s)=25/3(m/s)

30m/s= Km/h 30km/h= m/s 30km/h=?m/s 1.2m/s=[ ]km/h 2.5m/s=[ ]km/h 30m/s=[ ]km/h 700m/s=[ ]km/h km/h=?m/s? 30km/S=KM/H120KM/H= M/S25M/S= KM/H36KM/H= M/S10M/S= KM/MIN KM/S?M/MIN 30m/min=( )km/h54km/h=( )m/s5m/s=( )km/h 如5km/min= km/h= m/h= km/s= m/s 1km/min=?km/h=?m/h=?km/s= m/s 30km/h等于?m/s 30km/h等于多少m/s? 1m/s=( )km/h 1km/h=?m/s 1m/s= 多少 km/h 5.1m/s=多少km/h. 40m/s=多少km/h 120km/h=多少 m/s km/h=m/s啊?