A boy claps his hands and hears the echo later from a distant cliff

PHYSICS · Single correct · CBSE · Physics · Sound · Sound

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}

(b)

1360\,\text{m}

(c)

680\,\text{m}

(d)

85\,\text{m}