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f=300 Hz
v=450 m/s
Ditanyakan:x=?
Dijawab:
Cari λ
v=λf
λ=v/f
λ=450/300
λ=3/2
λ=1,5m
Baru cari x
x=1/4.λ
x=1/4.3/2
x=3/8
x=0,375m
x=37,5 cm