A) 84
B) 42
C) 21
D) 10.5
Correct Answer: B
Solution :
Fundamental frequency of string \[\text{= GCF}\]of the successive harmonics of frequencise 70 Hz and 84 Hz \[\therefore \] \[n=14\,Hz\] \[\Rightarrow \] \[\frac{v}{2l}=1.4\] \[\Rightarrow \] \[v=2\times 1.5\times 14\] \[=42\,m/s\]You need to login to perform this action.
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