15. Comparison between light and sound

A person observes the smoke from a gun 1.4 \(seconds\) before he hears the bang. if the gun is 409 \(m\) away from the person, find the speed of sound.(Don't consider about the medium)

 

 

Answer:

 

The speed of sound is  \(m/s\).

(Note: Enter up to two decimals)