A) 315.2m/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 \[t=\sqrt{\frac{2h}{g}}=\sqrt{\frac{2\times 19.6}{9.8}}=2\,\sec \] Time taken by echo to reach observer \[=2.06-2=0.06.\,\sec \] \[\therefore \]velocity of sound \[\upsilon =\frac{19.6}{0.06}=326.7\,m/s\]You need to login to perform this action.
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