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A source of sound is travelling with a v...

A source of sound is travelling with a velocity of `30(m)/(s)` towards a stationary observer. If actual frequency of source is 1000 Hz and the wind is blowing with velocity `20(m)/(s)` in a direction at `60^@C` with the direction of motion of source, then the apparent frequency heard by observer is (speed of sound is `340(m)/(s)`)

A

`1011Hz`

B

`1094Hz`

C

`1000Hz`

D

`1086Hz`

Text Solution

Verified by Experts

The correct Answer is:
B
`f.=f[(V+V_(m)costheta_(m))/(V+V_(m)costheta_(m)-V_(s))]=1000[(340+20cos60^(@))/(340+20cos60^(@)-30)]`
`=1094Hz`
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