Multiple Choice Questions on A Bus covers a distance of 36km at a uniform speed Had the speed been 6 kmph less it would have........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A Bus covers a distance of 36km at a uniform speed Had the speed been 6 kmph less it would have...........

Quantitative Aptitude ( CCS) Time & distance
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    A Bus covers a distance of 36km at a uniform speed.Had the speed been 6 kmph less, it would have taken one hour more for the journey.The original speed of the bus is

     

    30kmph
     

    Incorrect Answer

    12kmph
     

    Incorrect Answer

    18kmph
     

    Correct Answer

    20kmph

    Incorrect Answer
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    Explanation:

    (36/x-6)-(36/x)= x2 – 6x – 216 = 0
    x2-18x+12x-216 = 0
    (x+12)(x-18) = 0
    X = 18kmph

    By: Sandeep Dubey
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