October 2018 1 18 Report
Perhatikan gambar gelombang berikut!



Jika P ke Q di tempuh dalam waktu 3 sekon, maka cepat rambat gelombang adalah......
A. 72 m/s
B. 48 m/s
C. 12 m/s
D. 4 m/s

tolong jawab beserta cara yaa, makasiih

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