Physics

To find the person's average speed for the entire 15 minutes, we need to calculate the total distance traveled and the total time taken, and then use the formula for average speed:

 

 

Calculate the total time:

Convert time to seconds:

10 minutes = 10 × 60 = 600 seconds

5 minutes = 5 × 60 = 300 seconds

Total time = 600+300=900 seconds

 

Calculate the total distance:

Jogging distance:

Distance_j=Speed_j × Time_j = 3m/s × 600s = 1800m

 

Sprinting distance:

Distance_s = Speed_s × Time_s = 6m/s × 300s = 1800m

Total Distance = Distance_j +Distance_s =1800m+1800m=3600m

 

Then, calculate average speed:

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