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2009-12-11T21:26:39+01:00
Samochód pokona:

20km * 2,5h / 15min =
= 20 km * 150 min / 15 min =
= 20 km * 10 = 200km
4 3 4
2009-12-11T21:28:12+01:00
2,5h=150min

20km-15min
x-150min

x=20km*150min/15min=200km
5 2 5