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प्रश्न
A strong sound signal is sent from a ship towards the bottom of the sea. It is received back after 1s. What is the depth of sea given that the speed of sound in water 1450 ms–1?
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उत्तर
Velocity of sound in water = `"Distance travelled by sound"/"Time taken"`
Depth of the sea, d = velocity × time
d = `"vt"/2` = `(1450xx1)/2` = 725 m.
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