A ball is dropped into a well in which the water level is at a depth h below the top. If the speed of sound is c, then the time after which the splash is heard will be given by
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a
h2gh+1c
b
h2gh−1c
c
h2g+1c
d
h2g−1c
answer is A.
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Detailed Solution
Time of fall =2hgTime taken by the sound to come out =hcTotal time =2hg+hc=h2gh+1c