19. Numerical based on sound travel

1. A stone is dropped from the top of a well, which is 3500 \(m\) high from the water surface.When is the splash heard at the top?(\(g\) = \(10\)\(m/s²\) and speed of sound(\(v\)) = 342 \(m/s²\))

 

 

Thus, the total time taken by the splash sound to reach the top is  \(s\)