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    Question

    A train has to cover a distance of 90 km in 15 hours. If

    it covers half the journey in 4/5 th of the time, the speed to cover remaining distance in the time left has to be
    A 10 km/hr Correct Answer Incorrect Answer
    B 20 km/hr Correct Answer Incorrect Answer
    C 8 km/hr Correct Answer Incorrect Answer
    D 15 km/hr Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Total Distance = 90km Total Time = 15 hours 4/5th of the time = 15 × 4/5 = 12 hours Now, remaining distance = 90-45 = 45km Remaining time = 15 – 12 = 3 hours Average speed to cover the distance of 45 km will be 45/3 = 15km/hr.

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