The frequency of B is 3% greater than that of A. The frequency of C is 2% less than that of A. If B and C produce 8 beats/s, then the frequency of A is
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a
136 Hz
b
168 Hz
c
164 Hz
d
160 Hz
answer is D.
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Detailed Solution
vB=vA+3100vAvC=vA−2100vA⇒3100vA+2100vA=8⇒vA×5100=8 or vA = 160 Hz