Mathematics, 08.07.2019 15:30 avalonr2003

Acar travels from a to b at a speed of 40 mph then returns, using the same road, from b to a at a speed of 60 mph. what is the average speed for the round trip?

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Acar travels from a to b at a speed of 40 mph then returns, using the same road, from b to a at a sp...

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