ЁЯУв Too many exams? DonтАЩt know which one suits you best? Book Your Free Expert ЁЯСЙ call Now!

    Question

    Determine the speed of a Ship in calm water, given that

    the Ship's speed downstream is 20% greater than its speed in still water. If the Ship can cover 48 km both upstream and downstream in a total of 5 hours, what is the speed of the Ship in still water?
    A 30 km/hr Correct Answer Incorrect Answer
    B 20 km/hr Correct Answer Incorrect Answer
    C 50 km/hr Correct Answer Incorrect Answer
    D 45 km/hr Correct Answer Incorrect Answer
    E none of these Correct Answer Incorrect Answer

    Solution

    ATQ, Let speed of Ship in still water is тАШ5aтАЩ km/h Speed of Ship in downstream = 1.20 ├Ч 5a = 6a Speed of stream = 6a тАУ 5a = a km/h Speed of Ship in upstream = 5a тАУ a = 4a km/h So, (48/6a) + (48/4a) = 5 Or, (8/a) + (12/a) = 5 Or, a = (8 + 12)/5 = 4 Speed of Ship in still water = 5 ├Ч 4 = 20 km/hr

    Practice Next
    More Boats and streams Questions

    Relevant for Exams:

    ask-question