The length of the end of the banjo string when the fundamental frequency is 330Hz will be 0.61m.
The fundamental frequency will be given as:
f = v/2L
Let the required length be represented as L2.
Therefore, f1/f2 = L1/L2
L2 = (294 × 0.69)/330
L2 = 0.61m
Therefore, the length will be 0.61m.
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