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A whistle producing sound waves of frequencies \( 9500 \mathrm{HZ} \) and above is approaching a stationary person with speed \( \mathrm{vms}^{-1} \). The velocity of sound in air is \( 300 \mathrm{~ms}^{-1} \). If the person can hear frequencies upto a maximum of \( 10,000 \mathrm{HZ} \), the maximum value of v upto which he can hear whistle is
(a) \( 15 \sqrt{2} \mathrm{~ms}^{-1} \)
(b) \( \frac{15}{\sqrt{2}} \mathrm{~ms}^{-1} \)
(c) \( 15 \mathrm{~ms}^{-1} \)
(d) \( 30 \mathrm{~ms}^{-1} \)
\( \mathrm{P} \)
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