Question

A tornado siren begins blaring from the center of town 9.5 seconds after a tornado was spotted. The siren is located 490 meters north of a school. If the siren’s sound wave travels at a constant velocity of 350 meters per second south, how long will it take the sound wave to travel from the siren to the school?

Answer 1

The relationship between distance, time and velocity is:

`v=(d)/(t)`

The question ask us for the time, we can solve for t:

`v=(d)/(t)\Rightarrow t=(d)/(v)`

To find the time that it will take the sound wave travelling at 350 m/s to reach the school at 490m is the distance divided the velocity:

`\begin{gathered} t=(490m)/(350(m)/(s)) \\ \end{gathered}`
`t=1.4s`

The answer is 1.4s