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A speed ign motorcyclist sees traffic ha...

A speed ign motorcyclist sees traffic ham ahead of him. He slows doen to `36 km//h` He finds that traffic has eased and a car moving ahead of him at `18 km//h` is honking at a frequency of 1392 Hz. If the speed of sound is `343m//s`, the frequency of the honk as heard by him will be

A

1412 Hz

B

1454 Hz

C

1332 Hz

D

1372 Hz

Text Solution

Verified by Experts

The correct Answer is:
A
`f.=f((v+v_(o))/(v+v_(s)))`
`=1392((343+10)/(343+5))=1412Hz`.
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