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odp.:Średnia prędkość wynosi 40km/h.
zad.2
s=45min+45/60h
v=80km/h
v=s/t
s= v*t
s=⁶⁰₄₅ *80 trzeba poskracać
s= 60km
V= S:T
V= 240km : 3h= 80km/h
zad 2
45min= 45:60= 3:4h = 0.75h
S= V * T
S= 80km/h * 0.75h=60km
droga = 240 km
czas= 3h
240 km : 3h = 80 km/h
Zad.2
prędkość 80 km/h
czas = 45 min
80 km/h : 4 = 20 km/h
20 km/h x 3 = 60 km/h