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In a submarine equipped with sonar, the ...

In a submarine equipped with sonar, the time delay between the generation of a pulse and its echo after reflection from an eneny submarine is observed to be 80 sec. If the speed of sound in water is `1460ms^(-1)`. What is the distance of enemy submarine?

Text Solution

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The correct Answer is:
Speed of sound in water = 1460 `ms^(-1)`
Time delay = 80s
Distance of enemy ship = ?
Total distance covered = speed `xx` time
= 1460 `ms^(-1) xx 80s` = 116800 m
Time taken is for forward and backward path of sound waves.
Distance of enemy ship = `("Total distance covered")/(2) = (116800)/(2) m`
58400 m (or) 58.4 km
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