Which of the following expressions gives the distance (in metres) of a reflecting…

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

Problem

Which of the following expressions gives the distance

d

(in metres) of a reflecting wall if the speed of sound in air is

v

and an echo is heard after a time interval

t

? (a)

d = 2 v t

(b)

d = v t

(c)

d = \dfrac{v t}{2}

(d)

d = \dfrac{v t}{4}