Physics, 22.09.2020 06:01 babyface1686

Kim took 5 hours to complete a journey with an average speed of 80 km/h. For the first 3 hours, she travelled at an average speed of 60km/h. What was her average speed for the remaining time of the journey ?

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Kim took 5 hours to complete a journey with an average speed of 80 km/h. For the first 3 hours, she...