A source of sound with adjustable frequency produces 2 beats per second with a tuning fork when its frequency is either 476 Hz or 480 Hz. What is the frequency of the tuning fork?
Given:
First Frequency 
= 476 Hz
Second frequency 
= 480 Hz
Number of beats produced per second by the tuning fork m = 2
As the tuning fork produces 2 beats, its frequency should be an average of two.
This is given by:
1