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Subjects
Science CBSE
Class 9
Sound
Textbook based HOTS II
40.
Multiple choice question XL
Exercise condition:
2
m.
An object is \(11\ km\) below sea level. A ship sends down a sonar signal to confirm how deep the object is. After how long can it expect to get the echo?
(Take the speed of sound in sea water as \(1520\ ms^{−1}\).)
\(15.30\ s\)
\(14.47\ s\)
\(12.20\ s\)
\(11.13\ s\)
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