Jawabanmu

2014-01-29T20:11:25+07:00
K=2x3,14xr
k=2x3,14x20=125,6
125,6x1500=188400
2014-01-29T20:14:22+07:00
Keliling = 2 \pi
K = 2 x 3,14 x 20
K = 125,6 cm

Panjang lintasan = K x Putaran
Pl = 125,6 x 1500
Pl = 188.400 cm
Pl = 1.884 m

Maaf jika ada kesalahan :)