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    Question

    N workers can complete a piece of work in 50 days. When

    5 more workers joined, then the work got completed in 40 days, then what is the value of N?
    A 10 Correct Answer Incorrect Answer
    B 15 Correct Answer Incorrect Answer
    C 20 Correct Answer Incorrect Answer
    D 25 Correct Answer Incorrect Answer
    E 30 Correct Answer Incorrect Answer

    Solution

    As we know, M1 × D1 = M2 × D2 Where, M = number of Men and D = number of Days ⇒  N × 50 = (N + 5) × 40 ⇒  5N = 4N + 20 ⇒  N = 20 Hence, the value of N = 20

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