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A stone is dropped into a lake from a to...

A stone is dropped into a lake from a tower 500 metre high. The sound of the splash will be heard by the man approximately after

A

21 s

B

10 s

C

11.5 s

D

2.94 s

Text Solution

Verified by Experts

The correct Answer is:
D
According to formula,
Time taken by the sound, `t = (2d)/(v)`, where d is distance between source and reflective force.
`therefore t = (2 xx 500)/(340) = 2.94 s`
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