Odpowiedź :
8km / 16km/h = 0,5h = 30min
14:00 + 30 min = 14:30
8km / 20km/h = 0,4h = 24min
14:30 - 24min = 14:06
Odp: Wyjechał o 14:06.
14:00 + 30 min = 14:30
8km / 20km/h = 0,4h = 24min
14:30 - 24min = 14:06
Odp: Wyjechał o 14:06.
8km/2=4km
marta
4km/16km/h=0,25h=15minut
jacek
4km/20km/h=0,2h=12minut
14:00+0:15=14:15
14:15-0:12=14:0:03
Jacek wyruszył o 14:03
marta
4km/16km/h=0,25h=15minut
jacek
4km/20km/h=0,2h=12minut
14:00+0:15=14:15
14:15-0:12=14:0:03
Jacek wyruszył o 14:03
s=4km
V=16km/h
t= s/v = 4k:16km/h=1/4 h = 15min
14.00 + 15min= 14.15
s = 4km
v = 20km/h
t = s/v = 4km : 20km/h = 1/5h =12min
14.15 - 12min = 14.03
odp: Wyjechał o 14.03
V=16km/h
t= s/v = 4k:16km/h=1/4 h = 15min
14.00 + 15min= 14.15
s = 4km
v = 20km/h
t = s/v = 4km : 20km/h = 1/5h =12min
14.15 - 12min = 14.03
odp: Wyjechał o 14.03