Subject

    গাণিতিক যুক্তি

    Topic

    ভগ্নাংশ

    A container is 4/5 full. After 3 liters of its contents are poured out, the container is full. How many liters would need to be poured back in to refill the container?

    ক)
    12
    খ)
    15
    গ)
    18
    ঘ)
    20

    Explanation

    Let the total capacity of the container be C liters. - Initially: Container is 4/5 full = (4/5)C liters - After pouring out 3 liters: Container has (4/5)C - 3 liters - To refill completely: Need C - [(4/5)C - 3] liters Setting up the equation for the amount needed to refill: Amount to refill = C - (4/5)C + 3 = (1/5)C + 3 Since the answer is 15 liters: (1/5)C + 3 = 15 (1/5)C = 12 C = 60 liters Verification: - Initial amount: (4/5) × 60 = 48 liters - After pouring out 3 liters: 48 - 3 = 45 liters - Amount needed to refill: 60 - 45 = 15 liters The answer is B) 15 liters.

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