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**1. Homework Statement**

A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 3.2s later. If the speed of sound is 340 m/s, how high is the cliff.

**2. Homework Equations**

d= v1t + 1/2at^2

v2^2 = v1^2 + 2ad

**3. The Attempt at a Solution**

I tried using d = vt since we're given the speed of sound and the time taken for the sound to reach our ears. Since sound is unaffected by gravity, i thought i could straightaway use that formula, but I guess I was wrong. This is how far I got up to. Can someone give me a hand?

Thanks