(1)1km/h= km/min =m/s (2)8m/s= m/min =km/s

问题描述:

(1)1km/h= km/min =m/s (2)8m/s= m/min =km/s

(1)1km/h=1/60 km/min 5/18=m/s
(2)8m/s= 480m/min =0.008km/s