A) 4
B) 6
C) 8
D) 3
Correct Answer: C
Solution :
\[n=n\left( \frac{v+{{v}_{o}}}{v-{{v}_{s}}} \right)=272\left( \frac{345+5}{345-5} \right)\] \[(\because {{v}_{o}}={{v}_{s}}=18km/s=5m/s)\] \[\Rightarrow \] \[n=280\] \[\therefore \] Beats\[=n-n\Rightarrow 280-272=8\]You need to login to perform this action.
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