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    Question

    A man can row upstream at 18 km/hr and downstream at 24

    km/hr. Find the man’s rate in still water and the rate of the current.      
    A 22 km/hr & 4 km/hr Correct Answer Incorrect Answer
    B 27 km/hr & 3 km/hr Correct Answer Incorrect Answer
    C 23 km/hr & 2 km/hr Correct Answer Incorrect Answer
    D 21 km/hr & 3 km/hr Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Upstream = 18 km/hr Downstream = 24 km/hr Man’s rate in still water = 1/2  ×(24 + 18 ) = 21 km/hr   Rate of the current =  1/2  ×(24 - 18) = 3 km/hr  

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