# phyicis

posted by
**Matt** on
.

After cruising at 75 mph down I-80 for 15 minutes on a roach trip, you hit traffic and travel at 15m/s for 15 minutes for the rest of trip. your average speed is 24.26 m/s.

What if you were traveling at each speed for the same distance instead of time? What would your average speed be there?