an object is travelling 1/3 of the distance with a speed of 50 m/sec ,than rest 2/3 distance with a speed of 60 m/sec and than returns 2/3 distance with a speed of 80 m/sec than find the average speed
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an object is travelling 1/3 of the distance with a speed of 50 m/sec ,than rest 2/3 distance with a speed of 60 m/sec and than returns 2/3 distance with a speed of 80 m/sec than find the average speed
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