Answers

2016-03-02T06:26:19+05:30
Given Frequency v=2 k hz= 2*10³hz,
Wavelength=40cm=0.40cm
Speed of sound=frequency*wavelength
That is u = v*wavelength=(2*10³hz)*((0.40)
=0.80*10 Hz=800m-1
Time=distance/speed
That is t= s/v
Given distance ,=1.6 km=1.6*10³m²
Therefore, time=1.6*10³m/800m-1 = 1600/800 seconds= 2 seconds

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