A man notices a puff of smoke from a starting pistol and then hears the shot $1.5$ seconds later. The smoke and the sound are produced simultaneously. The starting pistol is $450$ metres from the man. What speed of sound is obtained from this observation?
- A$150\,\text{m s}^{-1}$
- B$300\,\text{m s}^{-1}$
- C$330\,\text{m s}^{-1}$
- D$625\,\text{m s}^{-1}$