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Stationary sound 'S' of frequency 334 Hz...

Stationary sound 'S' of frequency 334 Hz and a stationary observer 'O' are placed near a reflecting surface moving away from the source with velocity 2 m/s the apparent frequency of the echo of S considering velocity of sound equal to 334 m/s is
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A

14 cm `xx` 14 cm `xx` 3 cm

B

19 cm `xx` 18 cm `xx` 1 cm

C

13 cm `xx` 12 cm `xx` 4 cm

D

9 cm `xx` 8 cm `xx` 8 cm

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The correct Answer is:
B
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