A piano tuner hears beats per second when a string is sounded together with a tuning fork

PHYSICS · Single correct · CBSE · Physics · Waves · Waves

Problem

A piano tuner hears

6

beats per second when a string is sounded together with a

256\,\text{Hz}

tuning fork. After the tuner loosens the string slightly, the beat frequency increases to

9

beats per second. What was the original frequency of the piano string? (a)

262\,\text{Hz}

(b)

250\,\text{Hz}

(c)

256\,\text{Hz}

(d)

247\,\text{Hz}