Subject

    Bank Exam

    Topic

    Bangladesh Bank 2016 (Cash Officer)

    3 pumps, working 8 hours a day can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?

    ক)
    9
    খ)
    10
    গ)
    11
    ঘ)
    12

    Explanation

    3 pumps need 2 × 8 hours = 16 hours 1 pump needs 16 × 3 hours 4 pumps need (16 × 3)/4 hours = 12 hours

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