Question

A boy fires a gun and another boy at a distance of $1020m$ hears the sound of firing the gun $3s$ after seeing its smoke. Find the speed of sound.

Answer 1

Given,
Distance between the boys $=\text{Distance travelled by sound}$
$=1020m$
Now, since the sound of firing reaches the boy after
$3$ seconds, speed of sound is,
Speed $=\frac{\text{Distance travelled by sound}}{\text{Time taken}}$

$=\frac{1020m}{3s}=340m/s$

Hence, the speed of sound is $340m/s$.