October 2018 1 65 Report
Kedalaman laut akan diukur dgn teknik pantulan ultrasonik. Getaran pulsa ultrasonik yg dipancarkan dr kapal, diterima kembali oleh penerima di kapal 4 sekon kemudian. cpt rambat bunyi dlm air laut 1.400 ms-1 . kedlaman laut tersebut adlh..
a. 350 m
b. 700 m
c. 2.800 m
d. 5.600 m

mohon pake cara atuh:)
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