During day time sound level in silent zone is about

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During day time sound level in silent zone is about

Options

(a) 20 dB
(b) 30 dB
(c) 40 dB
(d) 50 dB

Correct Answer:

50 dB

Explanation:

No explanation available. Be the first to write the explanation for this question by commenting below.

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Topics: Conservation and Environmental Issues (111)
Subject: Biology (4253)

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