The average speed of the car is 19.62 km/hr.
'<em>Your question is not complete, it seems to be missing the following information'</em>
find the average speed of the car
The given parameters;
initial velocity of the car, u = 25 km/hr
time of motion of the car, t= 1.5 hr
final velocity, v = 21 km/h
time of motion, = 1.25 hr
The average speed of the car is calculated as follows;
Thus, the average speed of the car is 19.62 km/hr.
Learn more here: brainly.com/question/17289046