Jawabanmu

2014-08-23T07:01:11+07:00
20 meter/ sekon = 1,2 km/ menit
30 x 1,2 = 36 km

jadi jawabannya 36 km
2014-08-23T07:01:42+07:00
20 × 60 × 30 = 1.200 × 30 = 36.000 m = 36 km