Question

Nita heard the sound of lighting after 4 second of seeing it . What was the distance of the lighting from her ? ( The velocity of sound in air is 340 m/s

Answer 1

The velocity of sound in air= 340 m/s.

In one second, sound reaches 340 m.
In 4 seconds, sound reaches 340×4 = 1360 m

= 1.36 km.

The speed of light is 3×10^8 m/s. So, I have assumed that she saw the lightning as soon as it happened.
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