Jawabanmu

2014-03-07T15:56:49+07:00
154000:500 = jadi jawabannya adalah308
2014-03-07T15:58:03+07:00
K = jarak/banyak putaran
K = 154000/500
K = 308 cm

K = 2 phi r
308 cm = 2 x 22/7 x r
r = 308 x 7/44
r = 49cm

semoga membantu. maaf kalau salah