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[" In kach Question carries Four marks."],[" 11.A man walks on straight road from his home to a market 2.5km away with a speed 5kmph.Finding the "],[" market is closed,he instantly turns and walks back home with a speed of 7.5kmph.What is the "],[" (a) magnitude of average velocity and (b) average speed of the man over the time interval 0to "50" minutes."]

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