Odpowiedzi

2009-03-31T17:56:00+02:00
1 cm - 10000 cm <=> 1 cm - 100 m
12 cm - 1200 m

V=1200m/30 min <=>1200m/60*30s<=>12m/s<=2/3 m/s
V=2/3 m/s = 7200m/3*3600s = 7,2km/3h <=> 2.4 km/h