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40 m - 5 s
x - 240 s
x = ⅕ × 240 × 40
x = 1920
odp: 1920 metrów czyli 1,92 km
4min - 240 sekund
240:5 = 48
48*40 = 1920
odp. Tata Stasia jadac 4min pokonuje trase 1920m.