A ball is dropped into a well in which the water level is at a depth h below the top

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

Options

(a) h[(√2/gh)+(1/c)]
(b) h[(√2/gh)-(1/c)]
(c) h[(2/g)+(1/c)]
(d) h[(2/g)-(1/c)]

Correct Answer:

h[(√2/gh)+(1/c)]

Explanation:

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