A train moving at a speed of 220 m/s tow...

A train moving at a speed of 220 m/s towards a stationary object , emits a sound of frequency 1000 Hz . Some of the sound reaching the object gets reflected back to the train as echo . The frequency of the echo as detected by the driver of the train is

3000 Hz

3500 Hz

4000 Hz

5000 Hz

Text Solution

Verified by Experts

The correct Answer is:

`f. = ((330 + 220)/(330 + 220)) xx 1000 = 5000` Hz

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