Question 885773
On a 900-mile trip between Palm Beach and Washington, a plane averaged 450 miles per hour. On the return trip, the plane averaged 300 miles per hour. What was the average rate of speed for tge round trip, in miles per hour?
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Avg speed of a round trip is similar to parallel flows.
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Avg = 2*450*300/(450 + 300) = 270000/750
Avg = 360 mi/hr
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The distance does not matter.