It is the same thing happening to me
:(
If I give right answer also I am reported and if I give wrong answer also I am reported.
I don't why it happens
I think it is known as a pulsar!
Answer:
The possible frequency of guitar are 842 HZ and 892 HZ.
Explanation:
given the beat frequency =
= 25 HZ
we know that beat frequency = difference of frequencies of two instruments
therfore 25 = x-867 or 25 = 867-x
therefore x = 842 or 892