Subject

    Bank Exam

    Topic

    Janata Bank 2015 (AEO)

    Worker A takes 8 hours to do a job. Worker B takes 10 hour to do the same job. How long should it take both A and B, working together but independently, to do the same job?

    ক)
    4(4/9) days
    খ)
    4(4/7) days
    গ)
    4(3/8) days
    ঘ)
    None of these

    Explanation

    working together, they can do  1/10+1/8=9/40 they can do the whole job in: 40/9 days=4(4/9) days

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