How long would it take before the echo returned

Reference no: EM13701955

Solve the given problem:

Problem: Suppose the lab floor is 2.91 m beneath the motion detector. If the detector produces a click,

Part A: How long would it take before the echo returned (in seconds)?

Please show me how work it out above problem. I know the correct answer for above problem but explain how to get this answer! Thanks.

Reference no: EM13701955

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