Question

A song was heard by a person who is at certain distance from a temple wherein the frequency of the sound is 3 kHz and the wavelength 20 cm. If the sound reaches the person in 5 seconds find the distance travelled by the sound.

Answer 1

Answer:

See below.

Explanation:

First, we find the velocity of the sound wave,

$\begin{aligned}v=f\lambda =\left( 0.2\right) \left( 3\times 10^{3}\right) \\ =0.6\times 10^{3}\\ =600 \ ms^{-1}\end{aligned}$

The distance travelled is given by,

$\begin{aligned}d=vt\\ =\left( 600\right) \left( 5\right) \\ =3000 \ m\\ =3 \ km\end{aligned}$

Answer 2

Answer:

3km

Explanation:

wavelength = 0.2km

v=frequency x wavelength

 =3000 x 0.2

 =600

distance

d=vt

 =600 x 5

 =3000m

 =3km