October 2018 1 39 Report
Andi meniup peluit di depan tebing yang jaraknya 90 meter. Jika bunyi pantul terdengar 0,4 sekon setelah bunyi asli, maka cepat rambat bunyi udara saat itu adalah..
a. 170m/s
b. 340m/s
c. 360m/s
d. 450m/s

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