Jawabanmu

2014-04-22T09:27:26+07:00
K=22/7*28*2=44*4=176cm................ pnj lintasan=K*bnyk putaran............... =175*400=70400cm=704m
2014-04-22T09:31:45+07:00
K=2πr=2×22/7×28=176cm Panjang lintasan=170×400=68.000cm=680m
maaf salah ketik, 176×400=70.400cm=704m
gk papa,trimaksih banyak
sama2