A tall school building stands away from a blank wall

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

Problem

A tall school building stands

102\,\text{m}

away from a blank wall. How long after shouting should a student expect to hear the echo if the speed of sound is

330\,\text{m/s}

? (a)

0.31\,\text{s}

(b)

0.68\,\text{s}

(c)

0.62\,\text{s}

(d)

1.24\,\text{s}