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A man moves on a straight path. He travels total distance1. He travels half of his journey with speed 10 ms Theremaining part ofjourney was covered by him with speed20 m s1 for half of remaining time and with velocity40 m s1 for other half of remaining time. The averagespeed is(al 15 m s16.14l. He travels half of his journey with speed 10 ms1. The70

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