Question

A hunter fires a gun on a cliff. Sound of firing is heard 12.5 s after seeing the smoke by an observer 4 km away from the cliff. Calculate the speed of sound in the air

Answer 1

Answer:

When he walks 85 m towards the cliff then the echo of a second shot is now heard after 1.5 second. So it is clear from the figure is that:

in 1/4 sec the round travel=85m

SO, in 1 sec, sound travel =4×85=340 m