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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?
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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