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    Question

    An Indian express train is traveling at 9/15th of its

    normal speed and takes 45 hours to reach its destination. How much time would be saved if the train were running at its usual speed?
    A 18 hrs Correct Answer Incorrect Answer
    B 21 hrs Correct Answer Incorrect Answer
    C 36 hrs Correct Answer Incorrect Answer
    D 12 hrs Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the original speed of the Indian express train be 15x km/hr Speed with which it is running = 9x km/hr When train runs with speed of 9x km/hr it takes 45 hours When it will run with speed of 15x km/hr, the train will take = (45 × 9x)/15x = 27 hours Therefore, difference in time taken = 45 – 27 = 18 hours

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