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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-22

  • question_answer
    If a train runs at 40 km/h, it reaches its destination late by 11 min. But if it runs at 50 km/h, it is late by 5 min only. The correct time (in min) for the train to complete the journey is

    A)  13                   

    B)  15   

    C)  19                   

    D)  21

    Correct Answer: C

    Solution :

    Suppose whole journey = x Then,\[\frac{x}{40}-\frac{x}{50}=\frac{11}{60}-\frac{5}{60}\] \[\Rightarrow \]   \[\frac{5x-4x}{200}=\frac{6}{60}\] \[\Rightarrow \]   \[\frac{x}{200}=\frac{1}{10}\] \[\Rightarrow \]   \[x=20\] \[\therefore \]The correct time (in min) to complete the journey\[=\frac{20}{40}\,\,h-11\,\,\min \] \[\,\,\,\,\,\,\,\,\,\,\,\,\,=30\,\,\min \,\,-11\,\,min\] \[\,\,\,\,\,\,\,\,\,\,\,\,\,=19\,\,min\]


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