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1. |
A man fires a gun 150 m from a cliff. A second man who is standing 300 m further away from the cliff hears the gun 1 second after he sees the flash. The second man will hear the echo from the cliff |
A. | 1 second after seeing the flash |
B. | 2 seconds after hearing the gun |
C. | 2 seconds after seeing the flash |
D. | 4 seconds after hearing the gun. |
Answer» D. 4 seconds after hearing the gun. | |