Question

A sound wave has a frequency 2KHz and wavelength 40 cm. How long will it take to travel 1.6 km ?​

Answer 1

Answer: 2 seconds

Explanation:

frequency = n=2kHz= 2x1000 Hz

Wavelength=lambda= 40cm=40/100=0.4m

Speed of sound:

V= frequency * wavelength

=2×1000×0.4

=800m/s

Speed=Distance/ time

Distance= 1.6km= 1.6x1000m

Time= distance/ speed

= 1.6x1000/ 800

=16×100/800

=2sec.

Answer 2

hope so it is helpful......?!