Subject

    Bank Exam

    Topic

    Dutch Bangla Bank Ltd, PO 2015

    Mr. X can do a job in 8 days and his son can do it in 12 days, How many days will it take them to complete the job if they work together?

    ক)
    5
    খ)
    24/5
    গ)
    10
    ঘ)
    None of these

    Explanation

    For Mr X, in 8 days, he can do 1 job in 1 day, he can do 1/8 job For his son, in 12 days, he can do 1 job in 1 day, he can do 1/12 job If they work together, in 1 day, they can do (1/8 + 1/12) job = (3+2)/24 &nbs

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