A workman was working on the rail track. A young boy at a distance hold his ear near the rail track. This boy was able to hear sound of blow of workman twick. it is because of:

Asked in RPSC RAS Prelims 1995 · Topic: Sound (Speed of Sound in Different Media and Factors Affecting It)

1. The speed of sound is greater in steel than in air
2. The speed of sound is greater in air than in steel
3. Part of the sound wave is reflected between the rail track
4. His ear are at different distances from the source.

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