Question

    A man can row at 5 km/hr in still water. If the velocity

    of current is 2 km/hr and it takes him 1 hour to row to a place and come back, how far is the place?
    A 14.4 km Correct Answer Incorrect Answer
    B 4.8 km Correct Answer Incorrect Answer
    C 9.6 km Correct Answer Incorrect Answer
    D 2.1 km Correct Answer Incorrect Answer
    E 3.75 km Correct Answer Incorrect Answer

    Solution

    Let the distance be x km. Speed upstream = 5 – 2 = 3 km/hr Speed downstream = 5 + 2 = 7 km/hr ⇒ x/3 + x/7 = 1 ⇒ (7x + 3x)/21 = 1 ⇒ 10x = 21 ⇒ x = 21/10 = 2.1 km

    Practice Next
    More Boats and streams Questions

    Relevant for Exams:

    ask-question