A SONAR device uses ultrasound to find the depth of a lake to be 20 m. – InterviewSolution

1.	A SONAR device uses ultrasound to find the depth of a lake to be 20 m. If the sound is reflected back to the device in about 129th of a second, what is the speed of the sound in the lake?1160
Answer» A SONAR device uses ultrasound to find the depth of a lake to be $20 m$ . If the sound is reflected back to the device in about $\frac{1}{29} th$ of a second, what is the speed of the sound in the lake? 1160

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