Given,
Frequency, ν = 5 kHz = 5000 Hz
Wavelength, λ = 70 cm = 0.70 m
We know that speed, S of the wave = wavelength × frequency
S = λ ν
= 0.70 m × 5000 Hz = 3500 m/s
Time, T= Distance/Speed
= 5 * 1000/3500
= 1.42 seconds
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