Question

76. A stone is dropped into a well in which the level of water
is h below the top of the well. If v is velocity of sound, the
time T after which the splash is heard is given by??
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Answer 1

Answer:

sorry I don't know it as I am in 7 class

Answer 2

Explanation:

Time taken for thw ball to reach the bottom

= (2h/g)^1/2

Time taken by sound to reach the top

= h/v

Thus total time = (2h/g)^1/2 + h/v

Thus answer is B