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Q. A thunder clap is heard $5.5\,s$ after the lightening flash. The distance of the flash is (velocity of sound in air $= 330\, m/s$)

AMUAMU 2000

Solution:

We know that distance
$=$ velocity of sound $x$ time
Given, $v=330\, m / s , t=5.5 \,s$
$\therefore D=330 \times 5.5=1815\, m$