Physics

Problem

A boy standing in front of a cliff claps his hands and hears the echo

3.0\,\text{s}

later. Taking the speed of sound as

330\,\text{m s}^{-1}

, how far is the cliff from the boy? a)

247.5\text{ m}

990\text{ m}

495\text{ m}

514.5\text{ m}