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  3. a body covers half of its journey with speed 20 km

A body covers half of its journey with speed 20 km h and rest half...

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A body covers half of its journey with speed 20 km h and rest half of its journey with 40 km h What will be the average speed of this journey 320 km h 40 km h ad du al 1 36 66 km h 2 26 66 km h 3 30 km h 4 35 km h ZIEI

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