posted by Andrewk .
A sailor strikes the side of his ship just below the surface of the sea. He hears the echo of the wave reflected from the ocean floor directly below 3.88 s later. If the speed of sound in seawater is 1560 m/s, How deep is the ocean at this point?
d = 1560m/s * (3.88s/2) = 3026.4 m.
NOTE: 3.88 s = Time to travel to bottom
of ocean and return.