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| 1. |
A car is running with speed 18 km/h towards a wall and emits note of frequency 272 Hz. If speed of sound in air is 345 m/s,then frequency heard by an observer behind the wall is ? |
| Answer» A car is running with speed 18 km/h towards a wall and emits note of frequency 272 Hz. If speed of sound in air is 345 m/s,then frequency heard by an observer behind the wall is ? | |