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10s=80m
60s=480m
480*9=4320m=4,32 kilometra
480 m/min x 9 = 4320 m = 4,32km
Odp:. w ciagu 9 min pokona 4,32 km.
8m - 1 sek
x - 540s
x=4320 m=4,32 km