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zad.3. 150 minut = 2,5h. 2,5h*6km/h=15km-droga w czasie 150 minut
8km:6km/h=1 1/3h - czas w ktorym przechodzi 8km
zad.2. 18 1/6 - 15 3/6= 2 4/6
2 4/6 - 4,5/6= 3 5.5/6 spedzila w schronisku 3 godz. 55minut.