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During first half of a journey …

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During first half of a journey a body travels with a speed of 40 km per hour and in the next half a travels with a speed of 20 km per hour find the average speed of whole journey

    • Posted by Aayush Sharma 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Gaurav Seth 7 years, 2 months ago

    Let the total distance  be  2x .

    in first  half journey,

    in second  halg  journey,

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