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Dik :
waktu mengitari matahari 19,4 x 10^6 sekon
jarak venus ke matahari 108 . 10^6 km
karna venus mengitari matahari
maka ; V = 2π s/t
v= 2 . 3,14 . 108x10^6 / 19,4x10^6
v=6,28 . 5,56
v=34,96 -> 35 km/s B.