An unknown frequency x produces 8 beats per seconds with a frequency of 250 Hz and 12 beats with 270 Hz source, then x is [CPMT 1997; KCET 2000]

An unknown frequency x produces 8 beats per seconds with a frequency o

1.	An unknown frequency x produces 8 beats per seconds with a frequency of 250 Hz and 12 beats with 270 Hz source, then x is [CPMT 1997; KCET 2000]
A.	258 Hz
B.	242 Hz
C.	180
D.	282 Hz
Answer» B. 242 Hz

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An unknown frequency x produces 8 beats per seconds with a frequency of 250 Hz and 12 beats with 270 Hz source, then x is [CPMT 1997; KCET 2000]

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