A) 315.2 m/s
B) 320.5 m/s
C) 326.7 m/s
D) 332.4 m/s
Correct Answer: C
Solution :
Time taken by stone to touch water \[t=\sqrt{\frac{2h}{g}}=\sqrt{\frac{2\times 19.6}{9.8}}=2s\] Time taken by echo to reach observer \[=2.06-2=0.06\text{ }s\] \[\therefore \] Velocity of sound\[v=\frac{19.6}{0.06}=\text{ }326.7\text{ }m/s\]You need to login to perform this action.
You will be redirected in
3 sec