Calculate how high is the cliff

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Question: A stone is dropped from the top of a cliff. The splash it makes when striking the water below is heard 3.0s later.

Question 1: How high is the cliff?

m=_____?

For some reason I keep getting it wrong I don't know if it's a calculation error. Please show your work so I can see what I'm doing wrong with this above question.

Reference no: EM13694699

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