1
s= 800m= 8/10 km
t= 2 min= 1/30 h
v= s/t = 8/10 km / 1/30 h = 8/10 km x 30 h = 8 km x 3 h (skrócone przez 10) = 24 km/h
2
s= 500m = 1/2 km
t= 3/2 min = 1/40 h
v = s/t = 1/2 km / 1/40 h = 1/2 x 40 = 20 km/h
3
s= 100m= 1/10 km
t= 2h
v= s/t = 1/10 km / 2 h = 1/20 km/h
