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Explanation:
Given:
Velocity of sound in water =1550m/s
time for echo to be heard =4s
Time taken by sound waves to reach the bottom of the sea =4/2=2 s
\begin{gathered}velocity = \frac{distance}{time} \\ distance = velocity \times time \\ \: \: \: \: = 1550 \times 2 = 3100m \: \\ depth \: of \: the \: sea \: at \: that \: place \: = 3100m \: \end{gathered}velocity=timedistancedistance=velocity×time=1550×2=3100mdepthoftheseaatthatplace=3100m
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