A hiker stands between two vertical cliffs and fires a gun

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

Problem

A hiker stands between two vertical cliffs and fires a gun. He hears the first echo

0.90\,\text{s}

after the shot from the cliff in front of him and the second echo

1.50\,\text{s}

after the shot from the cliff behind him. If the speed of sound in air is

340\,\text{m/s}

, what is the distance between the two cliffs? (a)

306\,\text{m}

(b)

408\,\text{m}

(c)

255\,\text{m}

(d)

396\,\text{m}