Two Speakers Emit Incoherent Sound Waves into the Open Air

Two speakers emit incoherent sound waves into the open air. One of them produces 75W of power. A microphone is placed at a position that is 12m from each speakers, and it receives a total intensity of 0.25W/m². What is the power output of the second speaker?

A) 151 W
B) 377 W
C) Need more info to solve.
D) 38 W

Correct Answer:

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