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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 | |