1.

Wavelength of two notes in air are 1 m and `1(1)/(164)`m. Each note produces 1 beats/s with a third note of a fixed frequency. The speed of sound in air isA. `330 m//s`B. `340m//s`C. `350 m//s`D. `328 m//s`

Answer» Correct Answer - A
`lamda_1=1m, lamda_2=(165)/(164)m`
`f_1=(C )/(1)`,`f_2=(164C)/(165)`
`f-f_2=2`
`(C )/(165)=2` , `C=330 m//s`


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