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NTSE Sample Paper NTSE SAT Practice Test-12

  • question_answer
    A train covers a distance of 200 km between two stations at a speed ofx kmph. Another train covers the same distance at a speed of (x + 5) kmph. If the second train takes 2 hrs less than the first, what is the value of x?

    A) 25         

    B)                      20

    C) 30                                

    D) 40

    Correct Answer: B

    Solution :

    [b] xy = 200, where speed = x km/hr and time = y hr Also, \[\left( x\text{ }+\text{ }5 \right)\text{ }\left( y-2 \right)\text{ }=200\] we get, \[{{x}^{2}}+5x-500=0\] Solving we get, x = 20 km/hr


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