Multiple Choice Questions on Two buses start from a house with a speed of 4km hr at interval of 6 minutes With how much more spee........... for RRB(NTPC) Exam Preparation

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Multiple Choice Questions

Two buses start from a house with a speed of 4km hr at interval of 6 minutes With how much more spee...........

Quantitative Aptitude (RRB NTPC) Time & distance
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    Two buses start from a house with a speed of 4km/hr at interval of 6 minutes. With how much more speed (km/hr.) the woman coming from the opposite direction towards the house has to travel to meet the buses at an interval of 4 minutes?

    5

    Incorrect Answer

    3

    Incorrect Answer

    2

    Correct Answer

    4

    Incorrect Answer
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    Explanation:
    Distance travelled by one bus in 6
    min.=4x(6/60)=0.4 km
    Let speed of woman =S km/hr
    Relative speed of woman=(4+S)km/hr
    0.4km distance is travelled by woman in
    4min.
    0.4=(4+S)(4/60)
    S=2 km/hr

    By: Barka Mirza
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