a tuning fork is found to give 20 beats in 12 seconds when sounded in conjuction with a stretched string - Physics - Waves

Question

a tuning fork is found to give 20 beats in 12 seconds when sounded
in conjuction with a stretched string vibrating under a tension of
14 4 or 10 kgf Calculate frequency of the fork

Sia Kalra · Answer

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a tuning fork is found to give 20 beats in 12 seconds when sounded in conjuction with a stretched string vibrating under a tension of 14.4 or 10 kgf. Calculate frequency of the fork