A) 3.2 cm
B) 4.2 m
C) 4.2 cm
D) 3.2 m
Correct Answer: B
Solution :
Minimum audible frequency = 20 \[Hz\]. \[\Rightarrow \] \[\frac{v}{4l}=20\Rightarrow l=\frac{336}{4\times 20}=4.2\]\[m\]You need to login to perform this action.
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