Subject

    Quantitative Aptitude

    Topic

    Pipes & Cistern

    Rakib can complete a task in 30 minutes, and together with his brother Momin, he can complete the task in 20 minutes. How long would it take for Momin working along to complete the task ?

    ক)
    30
    খ)
    40
    গ)
    50
    ঘ)
    60

    Explanation

    Solution: 30×2030−20=30×2010\frac{{30 \times 20}}{{30 - 20}} = \frac{{30 \times 20}}{{10}} = 60 min

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