A submarine emits a sonar pulse which returns from an underwater cliff in 4 seconds .
If the speed of sound in salt water is 1531 metre / second , how far is the cliff .
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TOTAL TIME FOR THE SONAR PULSE TO TRAVEL AND REACH BACK AGAIN=4S
TIME TAKEN TO REACH THE GROUND=2S
VELOCITY=1531m/s
DISTANCE = 1531×2
DISTANCE=3062m
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Answer: I think the answer is 1535m\s
Explanation:
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