A boy standing in front of a cliff shouts and hears the echo of his voice later

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

Problem

A boy standing in front of a cliff shouts and hears the echo of his voice

2.4\,\text{s}

later. If the speed of sound in air is

340\,\text{m/s}

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

480\,\text{m}

(b)

204\,\text{m}

(c)

408\,\text{m}

(d)

816\,\text{m}