SOLUTION: A car travels at 20 km/h for the first 2 km of its trip, then travels at 40 km/h for the last 2 km of its trip. What is the average velocity of the car for the entire trip?

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Question 800978: A car travels at 20 km/h for the first 2 km of its trip, then travels at 40 km/h for the last 2 km of its trip. What is the average velocity of the car for the entire trip?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A car travels at 20 km/h for the first 2 km of its trip, then travels at 40 km/h for the last 2 km of its trip. What is the average velocity of the car for the entire trip?
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1st leg DATA: time = 2km/20km/h = 1/10 hour
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2nd leg DATA: time = 2km/40km/h = 1/20 hour
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Average speed = (total distance)/(total time)
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= 4 km/(1/10 + 1/20)
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= 4/(3/20)
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= 80/3
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= 26 2/3 km/hr
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Cheers,
Stan H.
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