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1 gelombang --> membutuhkan 0,5 detik
Jadi, 2 gelombang membutuhkan 1 detik
f=n/t
=2/1
=2 Hz
V=f λ
=2 x 4
=8 m/s (A)
26) S=V t
=340 x 2 = 680 m
Semoga Membantu