Subject

    Quantitative Aptitude

    Topic

    Pipes & Cistern

    Jamal needs 8 hours to do a job. Kamal takes 10 hours to do the same job. How long should it take Kamal & Jamal working together to do the job ?

    ক)
    5 hours
    খ)
    \(4\frac{1}{2}\)hours
    গ)
    \(2\frac{1}{2}\)hours
    ঘ)
    \(4\frac{4}{9}\)hours

    Explanation

    Solution: 8×108+10=8×1018=409\frac{{8 \times 10}}{{8 + 10}} = \frac{{8 \times 10}}{{18}} = \frac{{40}}{9}h = 4494\frac{4}{9}hours

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