A whistle producing sound waves of frequ...

A whistle producing sound waves of frequencies 9500 Hz and is approaching a stationary person with speed `v ms^(-1)` The velocity of sound in air is `300 ms^(-1)`. If the person can hear frequencies upto a maximum of 10,000 Hz. The maximum value of v upto which he can hear the whistle is

`30 ms^(-1)`

`15 sqrt(2) ms^(-1)`

`15 ms^(-1)`

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