Question

A boy fires a gun and another boy at a distance hears the sound of fire 2.5 s after seeing the flash . If speed of sound in air is 340 m/s. find distance between the boys ?

Answer 1

speed =distamce /time
distance =speed×time
=340×2.5
= 850m
850m is the distance between boys.

Answer 2

Distance = ?
Time = 2.5 s
Speed = 340 m/s

$d = s \times t$
$d = 340 \times 2.5$
$d = 34 \times 25$
$d = 850 \: m$

Answer. Distance is 850 m.

Hope it helps !!!