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Promień = 0,6 m
Obwód = 2πr = 2π*0,6 = 1,2π = 1,2 * 3,14 ≈ 3,768 ≈ 3,8 m = 0,0038 km
75, 36 km : 0,0038 = 19831,5 razy.
Odp. C