An industry is having two machines each will generate 70 dB noise. If both the machine are operated simultaneously, what will be the total noise generated from the machines?

Q. An industry is having two machines each will generate 70 dB noise. If both the machine are operated simultaneously, what will be the total noise generated from the machines?

A.            70 dB

B.            73 dB

C.            140 dB

D.            4900 dB

Answer: 73 dB