How to calculate how far away lightning is by counting seconds

How to count the seconds of time between lightning striking and the thunder clap to know the distance from how far the lightning struck - Quora

SOLVED: To estimate how far a lightning strike is from you, count seconds between the lightning flash and the thunder that arrives shortly thereafter and divide by five to get the distance

How do you calculate the distance of lightning - Quora

ii) The light speed is 3.0 x 108 m/s, and the sound speed is 340 m/s. Find the value of count N, “A child start counting after every second, he sees a

How far is a lightning? - EEWeb

Why You Should Count Between Thunder and Lightning - FLAME Furnace

Start counting after you see lightning to tell if you're in harm's way - ABC News

How to calculate how far away lightning is by counting seconds

Lightning Strike