Music is been played in two opposite
galleries with certain group of people.
In the first gallery a group of 4 singers
were singing and in the second gallery 9
singers were singing. The two galleries
are separated by the distance of 70 m.
Where should a person stand for hearing
the same intensity of the singers voice?
(Hint: The ratio of the sound intensity is
equal to the square of the ratio of their
corresponding distances).

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