Two sound waves of wavelengths 5 m and 6...

Two sound waves of wavelengths 5 m and 6 m formed 30 beats in 3 seconds. The velocity of sound is

A

`300ms^(-1)`

B

`310ms^(-1)`

C

`320ms^(-1)`

D

`330ms^(-1)`

Verified by Experts

The correct Answer is:

A

`f_("beat")=(30)/(3)=10Hz`
`f_("beat")=v((1)/(lambda_(1))-(1)/(lambda_(2)))=v((1)/(5)-(1)/(6))=(1)/(30)v`
`implies v=300m//s`.

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