12min=12*1/60h=1/5h
4km/h*1/5h=0,8km
0,8km=0,8*1000m=800m
800m:0,8m=1000
4000m-60min
x-12min
x=800m
800 : 0,8=1000 kroków
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12min=12*1/60h=1/5h
4km/h*1/5h=0,8km
0,8km=0,8*1000m=800m
800m:0,8m=1000
4000m-60min
x-12min
x=800m
800 : 0,8=1000 kroków