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Question

Ultrasonic signal sent from SONAR returns to it after reflection from a rock after a lapse of 1s. If the velocity of ultrasound in water is 1600m/s, the depth of the rock in water is
  1. 300m
  2. 400m
  3. 500m
  4. 800m

A
800m
B
300m
C
400m
D
500m
Solution
Verified by Toppr

If d is the distance of rock from SONAR then,

The distance covered by the sound wave is:
2d=vt

d=v×t2

=1600×12=800 m

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