100 cm/s= m/s
20 cm/s= m/min
8 km/min= m/s
3 m/s= km/h
prosze z obliczeniami ;)
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b)20cm/s=12m/min
bo: 20cm-1s
xcm-60s
x=20*60=1200cm=12m
c)8km/min-133m/s
8km-60s
xkm-1s
x=8/60km->8/60*1000=133m/s
d)3m/s=10,8km/h
3m-1s
xm-3600s
x=3*3600=10800m=10,8km