A stone is dropped in a well which is 19.6m deep. Echo sound is heard – McqOptions

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1.	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]
A.	332.6 m/sec
B.	326.7 m/sec
C.	300.4 m/sec
D.	290.5 m/sec
Answer» C. 300.4 m/sec

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