Wave Mechanics Question 818
Question: A stone is dropped in a well which is 19.6m deep. Echo sound is heard after 2.06 sec (after dropping) then the velocity of sound is
[RPMT 1999]
Options:
A) 332.6 m/sec
B) 326.7 m/sec
C) 300.4 m/sec
D) 290.5 m/sec
Show Answer
Answer:
Correct Answer: B
Solution:
$ t=\sqrt{\frac{2h}{g}}+\frac{h}{v}=\sqrt{\frac{2\times 19.6}{9.8}}+\frac{19.6}{v}=2.06 $
$ \Rightarrow $ $ v=326.7 $
$ m/s $
BETA
