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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

`1454Hz`

B

`1332Hz`

C

`172Hz`

D

`1412Hz`

Text Solution

Verified by Experts

The correct Answer is:
D
`n.=n[(V-V_(0))/(V-V_(s))]` `n.=1392[(343-(-10))/(343-(-5))]`
`1412Hz`
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