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Panjang lintasan = keliling lingkaran x banyak putaran
= 3,14 x 20 x 500
= 31.400cm = 314 m
berputar sebanyak 500 kali
Keliling = πd
3,14 × 20 = 62,8 cm
62,8 cm×500 = 31400 cm = 0,314 km