A fishing vessel off the coast of Trinidad uses sonar to detect a school of fish. The sonar pulse returns in 0.06 s and the speed of sound in seawater is 1500 m/s. How deep is the school of fish below the vessel?

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Question

A fishing vessel off the coast of Trinidad uses sonar to detect a school of fish. The sonar pulse returns in 0.06 s and the speed of sound in seawater is 1500 m/s. How deep is the school of fish below the vessel?

Accepted Answer

45 m — Using depth = (v × t) / 2 = (1500 × 0.06) / 2 = 90 / 2 = 45 m. Option A forgets to halve the total distance. Option B uses an incorrect speed calculation. Option D doubles the correct answer rather than halving.

Answer

25 m

Answer

90 m

Answer

180 m

Answer

45 m

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