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Time & Work MCQs

3question(s) · click a question to reveal the answer and explanation.

  1. A can complete a job in 10 days and B can complete the same job in 15 days. How many days will they take working together?
    a) 5 days
    b) 6 days
    c) 8 days
    d) 12 days
    View Answer & Explanation

    Correct answer: B — 6 days

    Explanation: A's 1-day work = 1/10, B's 1-day work = 1/15. Together = 1/10 + 1/15 = 3/30 + 2/30 = 5/30 = 1/6. So together they take 6 days.

  2. A can complete a job in 10 days and B can complete the same job in 15 days. How many days will they take working together?
    a) 5 days
    b) 6 days
    c) 8 days
    d) 12 days
    View Answer & Explanation

    Correct answer: B — 6 days

    Explanation: A's 1-day work = 1/10, B's 1-day work = 1/15. Together = 1/10 + 1/15 = 3/30 + 2/30 = 5/30 = 1/6. So together they take 6 days.

  3. A can complete a job in 10 days and B can complete the same job in 15 days. How many days will they take working together?
    a) 5 days
    b) 6 days
    c) 8 days
    d) 12 days
    View Answer & Explanation

    Correct answer: B — 6 days

    Explanation: A's 1-day work = 1/10, B's 1-day work = 1/15. Together = 1/10 + 1/15 = 3/30 + 2/30 = 5/30 = 1/6. So together they take 6 days.