June 2019 1 42 Report
Posisi P dan Q terpisah sejauh 90 cm. Cepat rambat gelombang tersebut adalah ...
A. 0,3 m/s
B. 0,5 m/s
C. 0,9 m/s
D. 1,2 m/s
( Gambar gelombang ⬆ )

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