6. Speed of the sound in air

A man fires a gun and hears its echo after 5 \(s\). The man then moves 324 \(m\) towards the hill and fires his gun again. If he hears the echo after 3.1 \(s\), calculate the speed of sound.

 

 

Answer:

The speed of the sound is  \(m/s\).

(Enter the answer up to one decimal)