Two sound waves of wavelengths \( 5 \mathrm{~m} \) and \( 6 \mathrm...

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Two sound waves of wavelengths \( 5 \mathrm{~m} \) and \( 6 \mathrm{~m} \) formed 30 beats in 3 seconds. The velocity of sound is
[EAMCET 2001]
\( \mathrm{P} \)
(a) \( 300 \mathrm{~ms}^{-1} \)
(b) \( 310 \mathrm{~ms}^{-1} \)
(c) \( 320 \mathrm{~ms}^{-1} \)
(d) \( 330 \mathrm{~ms}^{-1} \)
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