To Find The Distance Of Lightning
d = s * t
Where,
d is the distance to the lightning
s is the speed of sound in air
t is the elapsed time between lightning flash and thunder
Note : speed of sound ranges between 1100 to 1200 feet per second.
To Find The Speed Of Sound
\begin{array}{l}s = \frac{d}{t}\end{array}
Finding The Time Interval Between Flash And Thunder
\begin{array}{l}t = \frac{d}{s}\end{array}