Multiple Choice Questions on Distance between two stops X and Y is 1500km A bus covers the journey from X to Y at 80kmph and retu........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

Distance between two stops X and Y is 1500km A bus covers the journey from X to Y at 80kmph and retu...........

Quantitative Aptitude (CDS) Average
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    Distance between two stops X and Y is 1500km. A bus covers the journey from X to Y at 80kmph and returns back to Y with a uniform speed of 60 kmph. Find the average speed of the bus during the whole journey?

    66.57kmph

    Incorrect Answer

    68.57kmph

    Correct Answer

    49.59kmph

    Incorrect Answer

    55.14kmph

    Incorrect Answer
    Explanation:

    Required average speed = (2xy/x+y)kmph
    = (2 x 80 x 60)/(80+60) kmph
    = 68.57kmph

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