AP EAMCET Engineering 2011 Solved Paper

Section: Physics
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Question : 25 of 160
 
Marks: +1, -0
The wavelengths of two sound notes in air are
40
195
m
and
40
193
m
.
Each note produces 9 beats per second separately with a third note of fixed frequency. The velocity of sound in air in m∕s is
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