Question

if the velocity of a wave is 400 m/s and frequency is 100Hz,then the wavelength of the wave is-(a)6m (b)4m (c)3m (d) 2m.

Answer 1

we know
velocity = frequency x wavelength
so
400=100 x wavelength
so
wavelength= 4 m.

Answer 2

Hello Dear.


Answer ⇒ Option B.  → 4 m.


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Solution ↓

Given ⇒

Velocity of the Wave(v) = 400 m/s.
Frequency of the Wave(f) = 100 Hz.

Using the Formula,

  v = λ × f
where, λ = Wavelength of the Wave.

Now,
400 = λ × 100
∴ λ = 400/100
⇒ λ = 4 m.

∴ Wavelength of the Sound Wave is 4 m.

Hence, Option B. is Correct.

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Hope it helps.