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panjng jalan = 1,884 km = 188.400 cm
roda berputar 600 kali
maka :
K roda = 188400 / 600 = 314
jadi :
K = 2 x π x r
314 = 2 x 3,14 x r
r = 314 / 6,28
r = 50 cm
jadi jari2 roda = 50 cm
K x BPutaran = 188400 cm
K x 600 = 188400 cm
K = 188400/600
2πr = 314
r = 314/ (2 x 3,14)\\
r = 314/6,28
r = 50