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

    Question

    Pipe тАШXтАЩ can fill a tank in 20 hours while pipe

    тАШYтАЩ can empty it in 24 hours. They were operated alternately starting with pipe тАШXтАЩ. Find the percentage of tank filled this way in 72 hours.
    A 25% Correct Answer Incorrect Answer
    B 35% Correct Answer Incorrect Answer
    C 30% Correct Answer Incorrect Answer
    D 45% Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the total capacity of tank be 120 units

    Efficiency of pipe тАШXтАЩ = 120/20 = 6 units/hour

    Efficiency of pipe тАШYтАЩ = 120/24 = 5 units/hour

    Tank filled in 2 hours = (6 тАУ 5) = 1 unit

    Therefore, tank filled in (2 ├Ч 36 = 72 hours) = 1 ├Ч 36 = 36 units

    Required percentage of tank filled = (36/120) ├Ч 100 = 30%

    Practice Next
    More Quant Miscellaneous Questions

    Relevant for Exams:

    ask-question