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60m/60s=1 m/s
b) 300 cm/s = m/s
300cm=3m
3m/s
c) 36 km/h = m/s
36km=36000m
1h=3600s
36000m/3600s=10m/s
d) 20 m/s = km/h
20m=0,02km
1s=1/3600h
0,02km/(1/3600h)=2/100*3600=72km/h