A car, sounding a horn of frequency 1000...

A car, sounding a horn of frequency 1000 Hz, is moving directly towards a huge wall at a speed of 15 m/s. If speed of sound is 340 m/s, then the frequency of the echo heard by the driver is

1046 Hz

954 Hz

1092 Hz

908 Hz

Text Solution

Verified by Experts

The correct Answer is:

`n' = n[(n + v_(0))/(v - v_(s))]`
`= 1000 [(340 + 15)/(340 - 15)] = 1000 (355)/(325) = 1092 Hz`

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