kinematics question 2:

Question

When a person leaves his home for sightseeing by his car, the meter reads 12352 km. When he returns
home after two hours the reading is 12416 km. During journey he stay for 15 minute at midway.
(a)What is the average speed of the car during this period ?
(b)What is the average velocity?

Answer 1

(a) Total distance covered 12416 – 12352 = 64 km in 2 hours. 
Speed = 64/2 = 32 km/h 
(b) As he returns to his house, the displacement is zero. 
Velocity. = (displacement / time) = 0 (zero).