October 2018 1 29 Report
Taraf intensitas bunyi sebuah mesin rata-rata 50 dB. apabila 100 mesin di hidupkan bersama, maka taraf intensitasnya adalah
A. 20 dB
B. 50 dB
C.70 dB
D. 75 dB
E. 150 dB

*tolong di bantu yaa , kalo bisa ada jalannya

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