Question

A sound wave has a frequency 2khz and wavelength 40cm. calculate the time it takes to travel 1.6km. plsssss answer quickly

Answer 1

GIVEN:
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.
Therefore time required to travel 1.6km is 2sec.

Answer 2

f=2KHz = 2000Hz
wavelength=40cm = 0.4m
speed=frequency*wavelength
=2000*0.4=800m/s

distance=1.6km=1600m
v=distance/time
time=distance/speed
time=1600/800
=2sec