Question

# A source of wave vibrates with a frequency $$500 Hz$$. The wave travels $$33$$ m in $$0.1 s$$. How far does the waves travels when the source executes $$150$$ vibrations?

A
11m
B
99m
C
66m
D
128m

Solution

## The correct option is C $$99 m$$First, Wavelength $$= \dfrac{velocity}{ frequency}$$ Velocity $$=330 m/s$$Frequency $$= 500 hz$$So wavelength $$=\dfrac{33}{50}$$Distance travelled =velocity / frequency $$\times$$ no. of oscillations Hence,Distance travelled $$= \dfrac{33}{50}\times150$$$$=33\times 3$$$$=99 m$$Hence,option $$B$$  is correct answer.Physics

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