The wavelength of a sound wave is 40 cm and the time period is 0.0005 s. How many seconds will it take to travel a distance of 4 km?
The correct option is A 5 s
Wavelength of sound wave, λ=40 cm=0.4 m
Time period, T=0.0005 s
Distance travelled, s=4 km=4000 m
Let speed of sound wave be v.
Speed of a wave is the product will be:
v=0.4 m0.0005 s
Let the time taken for the wave to travel distance s be t.
From definition of speed,