Jawabanmu

2014-01-27T13:44:14+07:00
F= n/t = 600/120 = 5
T = t/n = 120/600 = 0,2
Periode=t/n=1200/600=2s frekuensi=n/t=600/1200=1/2hz
t= 120, bukan 1200