Two vibrating tuning forks produce progressive waves given by \( Y_...

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Two vibrating tuning forks produce progressive waves given by \( Y_{1}=4 \sin 500 \pi t \) and \( Y_{2}=2 \sin 506 \pi t \). Number of beats produced per minute is
[CBSE PMT 2005]
\( \mathrm{P} \)
(a) 360
(b) 180
(c) 3
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