SOLUTION: A car travels 180 km from A to B at 60 kph and returns from B to A along the same route at 90 kph. what is the average speed for the round trip?

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Question 881482: A car travels 180 km from A to B at 60 kph and returns from B to A along the same route at 90 kph. what is the average speed for the round trip?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A car travels 180 km from A to B at 60 kph and returns from B to A along the same route at 90 kph. what is the average speed for the round trip?
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Average speed = (total distance)/(total time)
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total distance = 2*180 = 360 km
total time = 180/60 + 180/90 = 3 + 2 = 5 hrs
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Average speed = 360 km/ 5 hrs = 72 kph
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Cheers,
Stan H.