SOLUTION: You are driving your car in a straight line at 15 m/s for 10 kilometers, then at 25 m/s for another 10 kilometers, is your average speed more than, less than, or equal to 20 m/s? W

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Question 482512: You are driving your car in a straight line at 15 m/s for 10 kilometers, then at 25 m/s for another 10 kilometers, is your average speed more than, less than, or equal to 20 m/s? Why?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
If you're driving at 15 m/s for 10 kilometers, it has taken you 10000/15 seconds, or 666.67 seconds. Similarly, we get 10000/25=400 seconds for the next part. All told, you have traveled 20000 meters over 1066.666667 seconds, which works out to 18.75 m/s.