A) \[v/\sqrt{2}\]
B) \[v/2\]
C) \[v/3\]
D) \[v/4\]
Correct Answer: C
Solution :
Frequency of reflected sound heard by driver \[{n}'=n\,\left( \frac{v+{{v}_{O}}}{v-{{v}_{S}}} \right)\] It is given that \[{n}'=2n\] Hence, \[2n=n\left( \frac{v+{{v}_{car}}}{v-{{v}_{car}}} \right)\] Þ \[{{v}_{car}}=v/3.\]You need to login to perform this action.
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