A. sky to land
B. sea to sky
C. land to sea
D. sea to land
Correct Answer: Option D
D. sea to land
![A pulse of a sound is transmitted from a ship and the reflection from the sea bed is recorded after 0.2s. Calculate the depth of the sea. [Take speed of sound in sea water = 1560m/s]](https://erudites.ng/wp-content/plugins/contextual-related-posts/default.png "A pulse of a sound is transmitted from a ship and the reflection from the sea bed is recorded after 0.2s. Calculate the depth of the sea. [Take speed of sound in sea water = 1560m/s]")
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