The average speed of car is calculated using the following formula:
[tex] Average speed=\frac{total distance travelled }{total time taken} [/tex]
This is same as obtained by rearranging the formula d=vt where, v is velocity, d is distance and t is time.
Here, distance travelled is 25 km and time taken is 30 min thus, average speed will be:
[tex] Average speed=\frac{25 km }{30 min}=0.833 km/min [/tex]
Thus, car's average speed is 0.833 km/min.
