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= 376,8 m : 200
= 37.680 cm : 200
= 188,4 cm
K = 2 × π × r
188,4 = 2 × 3,14 × r
r = 188,4 : 2 : 3,14
r = 94,2 : 3,14
r = 30
Jadi panjang jari-jari roda tersebut adalah 30 cm atau 0,3 m.