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    Question

    A Swimmer Walks 45km along the river's flow 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 4km/h Correct Answer Incorrect Answer
    B 5km/h Correct Answer Incorrect Answer
    C 3km/h Correct Answer Incorrect Answer
    D 6km/h Correct Answer Incorrect Answer

    Solution

    Let the speed of boat in still water =B and speed of stream =S then тАУ ATQ- B-S =6┬а┬а┬а┬а┬а┬а┬а┬а┬а┬а┬а┬а тАж (2) Solving (1) +(2) 2B =18 B=9km/h and S=3km/h.

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