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2009-12-09T19:47:11+01:00
Jacek
7.30 v=30km/h
v=s/t
30km/h=10km/t |x t
30km/h t = 10km
t=1/3h = 20 minut

7.30+0.20= 7.55

Ania
7.45 v= 60km/h
v=s/t
60km/h=10km/t
60km/h t=10 km
t=1/6h= 10 min

7.45+0.10=7.55

Będą w szkole o tej samej porze więc go dogoni.
2009-12-09T19:49:14+01:00
A)7.30 v=30km/h

30km/h=10km/t |x t
30km/h t = 10km
t=1/3h = 20 minut

7.30+0.20= 7.55
b
7.45 v= 60km/h
v=s/t
60km/h=10km/t
60km/h t=10 km
t=1/6h= 10 min

7.45+0.10=7.55