Question #199a9

1 Answer
A08
Dec 8, 2016

60dB

Explanation:

Given that Sound level of a piano is 50dB.

Total Sound level of n similar pianos will be n times the level of each piano. We know that n times can be written in dB as
10log_10 n
In the given problem n=10
Therefore 10 times
=10log_10 10 dB
=10xx1 dB
=10 dB

Total Sound level of 10 similar pianos will be=50+10=60dB

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