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An observer A fires a gun and another observer B at a distance 1650 m away from A hears its sound. If the speed of sound is 330ms^-1. The time when B will hear the sound after firing by A is

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2 s

3 s

5 s

7 s

answer is C.

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Detailed Solution

$t = \frac{d}{v} = \frac{1650}{330} = 5 s$

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