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

    Question

    A can complete a piece of work in┬а 10 days , and B can

    complete the same work in┬а 15 days . They start working together, and after some days A leaves. B completes the remaining work in┬а 5 days . For how many days did┬а A and B work together ?
    A 4 days Correct Answer Incorrect Answer
    B 7 days Correct Answer Incorrect Answer
    C 3 days Correct Answer Incorrect Answer
    D 5 days Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let total work = LCM(10, 15) = 30 units AтАЩs 1-day work = 30/10 = 3 units BтАЩs 1-day work = 30/15 = 2 units B alone works for 5 days тЖТ work done by B = 2 ├Ч 5 = 10 units Remaining work done together = 30 тИТ 10 = 20 units Together (A + B) do per day = 3 + 2 = 5 units Days they worked together = 20 / 5 = 4 days

    Practice Next
    More Time and work Questions
    ask-question