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The velocity of ultrasonic sound in wate...

The velocity of ultrasonic sound in water is 1400 m `s^(-1)` . The depth of the ocean as detected by SONAR if the time taken to receive the reflected wave is 15 s , is `"________"`.

A

21 km

B

10.5 km

C

105 m

D

1500m

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The correct Answer is:
B
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