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a-point-source-of-noise-produces-a-sound-of-60-db-at-a-distance-of-10-m-from-it-if-the-sound-is-measured-at-a-distance-of-40-m-what-will-be-its-value

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Q.

A point source of noise produces a sound of 60 dB at a distance of 10 m from it. If the sound is measured at a distance of 40 m, what will be its value ?

[A] 48 dB

[B] 54 dB

[C] 57 dB

[D] 44 dB

Answer & Explanation
Answer: 48 dB

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