A spectator watches a fireworks display and sees a rocket explode. They hear the bang of the explosion 1.8 seconds1.8\text{ seconds}1.8 seconds after seeing the flash. The rocket exploded at a distance of 612 metres612\text{ metres}612 metres from the spectator.
Assuming the light from the flash reaches the spectator almost instantly, what is the speed of sound calculated from this observation?
170 m/s170\text{ m/s}170 m/s
340 m/s340\text{ m/s}340 m/s
612 m/s612\text{ m/s}612 m/s
1100 m/s1100\text{ m/s}1100 m/s
295 exam-style questions on CIE IGCSE Physics Sound, covering Sound. Each one has a worked solution and a mark scheme showing where the marks go.