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10m-1s
600m-1minutę
3600m-1h
5400m-1.5h
odp.przebędzie w ciągu 1.5 h 5400m
b)1km=1000m
200m=0.2km
0.2km-20s
7.2km-12min
odp.12minut
b) 20s*7,2km/0,2m=730s
;**
200m=20s
Pomocne obliczenia:
10m=1s
1km=1000m
a) 1,5 h= 90 m=5400 s
5400 s * 10m = 54000 metry = 54 km
b)7,2*1000=7200 metry
7200/10=720=720sekund =12minut