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    Question

    Excluding the Stoppages i.e. Non-stop, the speed of a

    Bullet train is 810 km/h and including the stoppages, it is 720 km/h. Calculate for how many minutes does the bullet train stop per hour.
    A 20/3 minutes Correct Answer Incorrect Answer
    B 15 minutes Correct Answer Incorrect Answer
    C 20 minutes Correct Answer Incorrect Answer
    D 12(1/2) minutes Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Without stoppage, train can cover in 1 hr = 810km With stoppage, train can cover in 1 hr = 720km So in 1hr, trains stops for the time in which it can cover 90km (i.e.810 - 720) distance. So train stoped in 1 hr for = (810-720)/810 hrs = 90/810 hrs = 1/9 hr = 1/9 × 60 min = 20/3 min

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