Same chapter3 marksDifficulty: Medium
Why is the ceiling of a large concert hall often made curved?
Sound
3 marksDifficulty: Medium
A ship sends a sound signal towards the sea bed and receives the echo after 3 s. If the speed of sound in sea water is 1500 m s−1, find the depth of the sea.
Original Khojo Papers practice question — not from a past board paper.
Answer
2250 m
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The sound covers twice the depth in 3 s, that is 1500 × 3 = 4500 m, so the depth is 2250 m.
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