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TI₂ = 100 dB
n = ............?
Penyelesaian :
TI₂ = TI₁ + 10 log n
100 = 70 + 10 log n
30 = 10 log n
3 = log n
log 10³ = log n
10³ = n
n = 10³
n = 1000
Jadi, akan diperlukan jumlah mesin mobil sebanyak 1000 mesin (Jawaban D)