You drive a car for 2.0 h at 35 km/h, then for another 2.0 h at 64 km/h.
(a) What is your average velocity?
(b) What is your answer if instead you drive 99 km at each of the two speeds?
a)99 km / 4 hours
b)Then you would drive 4.379 hours and the average velocity would be 99 km / 4.379 hours.