📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!


    Question

    ‘P’ and ‘Q’ can complete a task together in 24

    days. If ‘P’ alone can do it in 40 days, find the number of days ‘Q’ alone will take to finish the task.
    A 60 days Correct Answer Incorrect Answer
    B 45 days Correct Answer Incorrect Answer
    C 25 days Correct Answer Incorrect Answer
    D 18 days Correct Answer Incorrect Answer

    Solution

    ATQ, Let the total work be LCM(24, 40) = 120 units. Combined efficiency of ‘P’ and ‘Q’ = 120 ÷ 24 = 5 units/day Efficiency of ‘P’ = 120 ÷ 40 = 3 units/day Efficiency of ‘Q’ = 5 - 3 = 2 units/day Time taken by ‘Q’ alone = 120 ÷ 2 = 60 days

    Practice Next
    ask-question