Two tuning forks with frequencies 256 Hz and 260 Hz are sounded together

PHYSICS · Subjective · A Level · Physics · Waves · Waves

Problem

Two tuning forks with frequencies 256 Hz and 260 Hz are sounded together, producing beats at a rate of 4 Hz. If both forks are warmed so that each frequency increases by 3 Hz, what will be the new beat frequency heard?

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