An object is 11 km below sea level. A research vessel sends down a son – InterviewSolution

1.	An object is 11 km below sea level. A research vessel sends down a sonar signal to confirm this depth. After how long can it expect to get the echo? (Take the speed of sound in seawater as 1,520 m/s)
Answer» An object is $11 k m$ below sea level. A research vessel sends down a sonar signal to confirm this depth. After how long can it expect to get the echo? (Take the speed of sound in seawater as $1, 520 m / s$ )

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