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    Question

    A does 2/5 of a work in 9 days. Then B joined him and

    they together completed the remaining work in 6 days. B alone can finish the whole work in
    A A Correct Answer Incorrect Answer
    B B Correct Answer Incorrect Answer
    C C Correct Answer Incorrect Answer
    D D Correct Answer Incorrect Answer

    Solution

    If A can complete 2/5 of work in 9 days, then he can complete whole work in (9×5)/2 = (9×5)/2 = 22.5 days. Let B take x number of days to complete the work. According to question, (2/45 + 1/x) × 6 = 3/5 x = 18 days. So, the answer would be option d) 18 days

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