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= 2 x phi x r
= 2 x 3,14 x 20
= 125,6 cm
maka,
p.lintasan
= K.roda x banyak putaran
= 125,6 cm x 100
= 12.560 cm
= 125,6 m
100(3.14×2.20)
100(125.6)
12560cm
125.6m