A stone is dropped from the top of a tower 125 m high into a pond of water base of the tower. When is splash heard at the top

CBSE Class 9 CBSE Class 9 Science
1

A stone is dropped from the top of a tower 125 m high into a pond of water base of the tower. When is splash heard at the top.
[g = 10 ms–2 and speed of sound = 340 ms–1]

2

Here, s = 125g, g = 10ms–2, u = 0, t = t1
Time taken by the stone to fall on the top of the pond
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or t1 = 5s
Time taken by sound to travel from the top of the pond to the ear
image
Hence, total time = 5 + 0.37 s