1.

The echo of a gunshot is heard 8 sec. after the gun is fired. How far from him is the surface that reflects the sound (velocity of sound in air = 350 m/s) [JIPMER 1999]

A. 1400 m
B. 2800 m
C. Both longitudinal and transverse elastic waves
D. 350 m
Answer» B. 2800 m


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