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s=100m
t=20s
v= 100m/20s=5m/s
t=20s= 1/3min
v=100m/1/3min= 300m/min
t=20s= 1/180h
v=100m/1/180h= 18000m/h
dane s=100m, t=20s
v= s/t = 100m/20s = 5m/s = 5m*60/60s = 300m/min = 300m*60/60min = 18km/h
......................pozdrawiam