You drive on Interstate 10 from San Antonio to Houston, half the time at 63 km/h and the other half at 86 km/h. On the way back you travel half the distance at 63 km/h and the other half at 86 km/h.
(a) What is your average speed from San Antonio to Houston?
km/h
(b) What is your average speed from Houston back to San Antonio? and
km/h
(c) What is your average speed for the entire trip?
km/h
(d) What is your average velocity for the entire trip?
km/h