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The pitch of the whistle of an engine ap...

The pitch of the whistle of an engine appears to drop to `(frac(5)(6)^(th)` of original value when it passes a stationary observer. If the speed of sound in air in `350 m//s` then the speed of engine is

A

35 m/s

B

70 m/s

C

105 m/s

D

140 m/s

Text Solution

Verified by Experts

The correct Answer is:
B
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