Multiple Choice Questions on A person covers a certain distance at 60kmph and return the same distance at 40 kmph What is t........... for CDS Exam Preparation

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Multiple Choice Questions

A person covers a certain distance at 60kmph and return the same distance at 40 kmph What is t...........

Quantitative Aptitude (CDS) Time & distance
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     A person covers a certain distance at 60kmph and return the same distance at 40 kmph. What is the average speed of entire journey?

     

    50kmph
     

    Incorrect Answer

    46kmph
     

    Incorrect Answer

    48kmph
     

    Correct Answer

    52kmph

    Incorrect Answer
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    Explanation:

    let the distance be D
    2D/ [ (D/40) + ( D/60)]
    = 2/ [(1/40) + (1/60)]
    = 2/100×2400
    = 48kmph

    By: bhavesh kumar singh
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