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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

11.5 seconds

B

21 seconds

C

10 seconds

D

14 seconds

Text Solution

Verified by Experts

The correct Answer is:
A
Time taken by the stone to reach the lake
`t_(1)=sqrt((2h)/(g))=sqrt((2xx500)/(10))=10sec`
Time taken by sound to travel from lake to the man `t_(2)=(h)/(v)=(500)/(330)=1.5sec`
Time taken = `t_(1)+t_(2)=11.5` sec.
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