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An engine running at speed (v)/(10) soun...

An engine running at speed `(v)/(10)` sounds a whistle of frequency 600 Hz. A passenger in a train coming from the oppsite side at speed of `(v)/(15)` experiences this whistle to be of frequency f. If v is speed of sound in air and there is no wind. F is nearest to

A

710 Hz

B

630 Hz

C

580 Hz

D

510 Hz

Text Solution

Verified by Experts

The correct Answer is:
A
`n.=n[(v+v_0)/(v-v_s)]=600[(v+v//15)/(v-v//10)]`
`=600[16/15 times10/9]=(400 times16)/9=711`
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