30m/detik =........km/jam

30m = 30 × 1000 = 30000km

1 jam = 3600 detik

= 30 : 30000/3600
= 30 × 3600/30000
= 108000/30000
= 36/10
= 3,6 km/jam

jadi, 30m/detik = 3,6km/jam

Maaf jika ada kesalahan ;)