The sound from a source travelled to the bottom of the sea and the echo...

JAMB 1994

The sound from a source travelled to the bottom of the sea and the echo was heard 4s later. If the speed of sound in sea water is 1500ms^-1 the depth of the sea is

A. 6000m
B. 3000m
C. 1500m
D. 375m

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Correct Answer: Option B

Explanation

t = 4s ; v = 150ms^-1

depth = X ; but 2X = vt

X = \(\frac {vt}{2}\) = \(\frac {1500 \times 4}{2}\)

X = 3000m

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The sound from a source travelled to the bottom of the sea and the echo...

Correct Answer: Option B

Explanation

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