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120 minut = 7500m / :7,5
16 minut = 1000m
a więc jest o 16/60 godziny.
x h -> 1 km
x h = (2 h * 1 km) / 7,5 km = 2 h*km / 7,5 km = 2/7,5 h = 4/15 h.
4/15 * 60 min = 24 min.
Odp. 4/15 godziny, co stanowi 24 minuty.