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    Question

    A boat moving downstream covers a distance of 200km in 5

    hrs as long as to cover the same distance upstream it takes 10hrs. What will be the time taken by boat in still water to cover 360km.
    A 5 hrs Correct Answer Incorrect Answer
    B 2 hrs Correct Answer Incorrect Answer
    C 10 hrs Correct Answer Incorrect Answer
    D 12 hrs Correct Answer Incorrect Answer
    E none of these Correct Answer Incorrect Answer

    Solution

    Let a boat moving in Downstream speed ,  (V + S) = 200/5 …..(1) = 40 km/h  Upstream speed, (V - S) = 200/10…… (2) = 20 km/h  Adding both equations (1) and (2) 2V= 60 km/h  V= 30km/h  Time in which boat will cover 360km in still water will be  = 360/30 = 12 hrs.

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