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    Question

    A boat racer can row 45/2km/h in still water. If the

    speed of river is 12.5 km/h, it takes him 40 minutes to row to a place and back, how far off is the place (consider up to two decimals)?
    A 3 Correct Answer Incorrect Answer
    B 4 Correct Answer Incorrect Answer
    C 1 Correct Answer Incorrect Answer
    D 2 Correct Answer Incorrect Answer

    Solution

    Speed of boat in still water =B=45/2 =22.5km/h Speed of river (Stream)=S =12.5km/h Speed of boat in upstream =22.5-12.5=10km/h Speed of boat in Downstream=22.5+12.5=35km/h Let the distance =D ATQ-

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