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A motor cycle starts from a stationary source of sound and moves away from the source with a uniform acceleration 2ms^-2. Distance travelled by the motor cycle when the person on it hears the sound of frequency which is 94% of the true frequency, is nearly (speed of sound in air = 300 ms^-1)

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49 m

98 m

147 m

193 m

answer is B.

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Detailed Solution

$\frac{f^{1}}{f} = (\frac{V - at}{V}); S = \frac{1}{2} {at}^{2}$

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