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Mathematics, 03.09.2021 06:30 boi3456

a man climbs up a slope at a speed of 60km per hour and descends it at the speed of 90km per hour. if the distance covered each way is same. find the average speed for the entire journey.

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a man climbs up a slope at a speed of 60km per hour and descends it at the speed of 90km per hour. i...

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