Question

A sound of frequency 5000 Hz and wavelength of 20 cm. How long will it take to travel 1 Km?

Answer 1

Dear Student,

There is a direct relationship between speed of sound and wavelength and frequency.

We know,

Speed of Sound = Wavelength * Frequency
= .2 m * 5000 Hz
=1000 m/s

Speed = Distance/Time
Time= Distance/Speed
= 1 km/ 1000 m/s
=1000 m/1000 m/s
=1 s.

Therefore, the time taken to travel 1 km is 1 s.