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Verified answer
Cari panjang gelombangnya;2lamda=16 meter
lamda=8 meter
cari frekuensinya;
f=n/t
=2/8
=0,25 Hertz
maka;
v=lamda×f
=8×0,25
=2 m/s
jadi cepat rambatnya adalah 2 m/s
jawabannya A
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