Jawabanmu

2014-05-30T12:54:58+07:00
S = 62800 cm
keliling = s : putaran = 62800 : 400 = 157 cm
2014-05-30T12:55:17+07:00
Keliling = lintasan : putaran
           = 62800 cm : 400
           = 157 cm keliling nya