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s=27km=2700m
t=?
t=s/v
t=2700/1,5
t=1800s.
t=30min.
Odp: W czasie 30 minut pokona drogę 27km.
V=1,5m/s *3600=5400m/h :1000=5,4 km/h
S=27km
szukane:
czas=t=?
S= V *t /:V
t=27km :5,4 km/h
t=5h