Mathematics, 25.08.2020 04:01, bricquan10

A motorist travelled from Ibadan to Lagos a distance of 142km at an average speed of 60km/h. he spent 2 1/2hours in Lagos and then returned to Ibadan at an average speed of 80km/h. At what time did he arrive in Ibadan? What is the average speed of the whole journey?

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A motorist travelled from Ibadan to Lagos a distance of 142km at an average speed of 60km/h. he spen...