Question

    A man can row a boat at 8 km/h in still water. If the

    speed of the water current is 2 km/h and it takes him 2 hours to row to a place and come back, how far off (in km) is the place?
    A 7.5 Correct Answer Incorrect Answer
    B 6 Correct Answer Incorrect Answer
    C 9.5 Correct Answer Incorrect Answer
    D 10 Correct Answer Incorrect Answer

    Solution

    1. Let d be the distance to the place. 2. Speed downstream = 8 + 2 = 10 km/h and speed upstream = 8 − 2 = 6 km/h. 3. Total time for the trip is 2 hours. So, 4. Solving for d:

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