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 = 1560ms-1]
-
A.
312.0m -
B.
156.0m -
C.
78.0m -
D.
31.2m
Correct Answer: Option B
Explanation
x = (frac{vt}{2} = frac{1560 times 0.2}{2} = 156m)