Multiple Choice Questions on A train overtakes two persons walking along a railway track The first person walks at 4 5 km hr and ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

A train overtakes two persons walking along a railway track The first person walks at 4 5 km hr and ...........

Quantitative Aptitude ( CCS) Problems on trains
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    A train overtakes two persons walking along a railway track. The first person walks at 4.5 km/hr and the other walks at 5.4 km/hr. The train needs 8.4 and 8.5 seconds respectively to overtake them. What is the speed of the train if both the persons are walking in the same direction as the train?

    81km/hr

    Correct Answer

    88km/hr

    Incorrect Answer

    62km/hr

    Incorrect Answer

    46km/hr

    Incorrect Answer
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    Explanation:

    Let speed of the train be v kmph
    (v−4.5):(v−5.4)=8.5:8.4(? speed and time are inversely proportional)

    ⇒(v−4.5):(v−5.4)=85:84

    ⇒84(v−4.5)=85(v−5.4)

    ⇒84v−378=85v−459

    ⇒v=81

    Hence, option 1 is the correct answer.

    By: Amit Kumar
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