October 2018 2 69 Report
Azizah mengukur kedalaman gua menggunakan gelombang bunyi . saat itu kecepatan bunyi di udara 340 m/s. bunyi pantul diterima setelah 2,2 sekon. kedalaman gua adalah... m (cara :)
a.340
b.374
c.680
d.784
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