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Two loudspeakers are set up at the top corners of a rectangular courtyard. The sides of the courtyard are L and W . Both speakers

Two loudspeakers are set up at the top corners of a rectangular courtyard. The sides of the courtyard are L and W. Both speakers emit the same frequency.

Speaker 1 Speaker 2 L Wstop at one of these two Speaker 1 positions start at Speaker 2 midpoint D C D C

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