Mathematics, 28.07.2019 12:00 bosa1423ov5zrr

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

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