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    Question

    A Swimmer Walks 30km along the flow of the river in 3

    hours 45 minutes and walks 15km against the flow in 2 hours 30min. Find the speed of the boat in Still Water and the Speed of flow
    A 7km/h ,1km/h Correct Answer Incorrect Answer
    B 7km/h,5km/h Correct Answer Incorrect Answer
    C 8km/h,2km/h Correct Answer Incorrect Answer
    D 7km/h,7km/h Correct Answer Incorrect Answer

    Solution

    Let the speed of boat in still water =B and speed of stream =S then – ATQ- B-S =6             … (2) Solving (1) +(2) 2B =14 B=7km/h and S=1km/h

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