How Fast Must You Drive to Average 22 km/h Over 24 km?

[faustud.]

I have a question for anyone willing to help that I can't seem to figure out along with quite a few of my classmates:

-You jog at 9.5 km/h for 8.0 km, then you jump into a car and drive an additional 16 km. With what average speed must you drive your car if your average speed for the entire 24 km is to be 22 km/h?

 

[ranger]

You need to show some work. How about you start by telling us what you know about average speed and average velocity.

 

[faustud.]

I ended up figuring it out.