Rob drove to the nearest hospital with an average speed of v m/s in t seconds. In terms of t, if he drives home on the same path, but with an average speed of 3v m/s, how long is the return trip home?

Respuesta :

The distance travel in the first ride is:

[tex]d=vt[/tex]

this means that the time on the first ride is:

[tex]t=\frac{d}{v}[/tex]

Now, if we travel the same distance but with a velocity of 3v the time would be:

[tex]\begin{gathered} d=3vt^{\prime} \\ t^{\prime}=\frac{d}{3v} \\ t^{\prime}=\frac{t}{3} \end{gathered}[/tex]

This means that the ride home took a third of the original time, therefore the ride homw takes t/3 seconds.