1. The problem statement, all You drive on Interstate 10 from San Antonio to Houston, half the time at 65 km/h and the other half at 117 km/h. On the way back you travel half thedistance at 65 km/h and the other half at 117 km/h. What is your average speed (a) from San Antonio to Houston, (b) from Houston back to San Antonio, and (c) for the entire trip? (d) What is your average velocity for the entire trip? and given/known data 2. Relevant equations 3. The attempt at a solution For a. i just divided added the two veloicities and divided by 2 and that was because it was half the TIME. I am really stumped as to how to find B and have no clue where to start as i am not given much information. I somewhat know i have to do something involving s=d/t with some unknowns but other than that have no clue please help only on B.