Q 1409156018.     Two sound sources are moving in opposite directions
with velocities `v_1` and `v_2` `(v_1 > v_2)` . Both are moving
away from a stationary observer. The frequency of
both the sources is 900 Hz. What is the value of
`v_1 - v_2` so that the beat frequency observed by the
observer is 6 Hz. Speed of sound v = 300 m/s. Given,
that `v_1` and `v_2` < < `v`.

A

`1` `m//s`

B

`2` `m//s`

C

`3` `m//s`

D

None of these

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