Answer: The average speed while walking is 12 km/hr.
Step-by-step explanation:
Average speed is defined as the ratio of total distance traveled to the total time taken.
To calculate the average speed while walking, we use the equation:
![\text{Average speed}=\frac{\text{Total distance traveled}}{\text{Total time taken}}](https://img.qammunity.org/2019/formulas/physics/middle-school/ajxigk7switkaabwuyi9t3tt0dpxek992i.png)
We are given:
Distance from school to home = 5 km
Time taken = 25 mins = 0.417 hr (Conversion factor: 1 min = 60 sec)
Putting values in above equation, we get:
![\text{Average speed while walking}=(5km)/(0.417hr)=12km/hr](https://img.qammunity.org/2019/formulas/physics/middle-school/ut8jmy1phd3rit5je3ycmn8dl40mi939x4.png)
Hence, the average speed while walking is 12 km/hr.