Question

    A man row a boat  1 km in 5 min, along the stream and 6

    km in 1hrs against the stream, The speed of the stream will be 
    A 12 km/hr Correct Answer Incorrect Answer
    B 6 km/hr Correct Answer Incorrect Answer
    C 2 km/hr Correct Answer Incorrect Answer
    D 3 km/hr Correct Answer Incorrect Answer

    Solution

    ATQ, Downstream speed = D (1 km)/(5/60)hr = 60/5 = 12 km/hr Upstream Speed = U = 6km/1hr = 6km/h Speed of thr stream , (D - U/2) = (12 - 6)/2 = = 6/2 = 3 km/hr

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