Physics

Problem

A boy claps his hands and hears the echo

4.0\,\text{s}

later from a distant cliff. If the speed of sound in air is

340\,\text{m/s}

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

340\,\text{m}

1360\,\text{m}

680\,\text{m}

85\,\text{m}