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

    Question

    B alone can finish a job in 18 days. A is twice as

    efficient as B. In how many days can A and B together complete the job?
    A 10 days Correct Answer Incorrect Answer
    B 6 days Correct Answer Incorrect Answer
    C 8 days Correct Answer Incorrect Answer
    D 5 days Correct Answer Incorrect Answer

    Solution

    If B takes 18 days, BтАЩs work rate = 1/18 job per day. A is twice as efficient тЖТ AтАЩs rate = 2 ├Ч (1/18) = 1/9 job per day. Together: rate = 1/18 + 1/9 = 1/18 + 2/18 = 3/18 = 1/6 job per day. Time taken together = 1 ├╖ (1/6) = 6 days

    Practice Next
    More Time and work Questions

    Relevant for Exams:

    ask-question