Question

if the velocity of sound in air is 340m/s calculate the (a) wavelength when frequency is 256 hertz (b) frequency and wavelength is 0.85 M

Answer 1

We know that 
speed of sound = wavelength * frequency
a) 340m/s = wvm * 256Hz
wv = 340/256 = 1.328125m

b) 340m/s = 0.85m * fqHz
​fq = 340/0.85 = 400Hz

**Note** 
m = meters
​s = second
Hz = Hertz
wv = wavelength
fq = frequency
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Answer 2

Hey!

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Velocity = 340 m/s
Frequency = 256 Hz
Wavelength = ?

(a) Wavelength = Velocity / Frequency
Wavelength = 340 / 256
Wavelength = 1.32 m

(b) Frequency =?
Wavelength = 0.85 m
Velocity = 340 m/s

Frequency = Velocity/ Wavelength
Frequency = 340/0.85
Frequency = 400 Hz

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Hope it helps...!!!