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Verified answer
KELAS = 8PELAJARAN = FISIKA
KATEGORI = Geombang
KATA KUNCI = Bunyi pantul, cepat rambat, jarak dinding
Diketahui :
s total = 30 m
tB = 3 s
sA = 18 m
Ditanyakan : tA ?
Dijawab :
sB = s total - sA
= 30 - 18
= 12 m
Cepat rambat bunyi diudara :
s = v x t / 2
12 = v x 3 / 2
12x2 = 3 v
v = 24/3
v = 8 m/s
Waktu untuk mendengar bunyi dr dinding A
s = (Vxt)/2
t = 2S/v
= (2x 18) / 2
= 18 s