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    Question

    Pipe 'A' takes 10 minutes to fill half the tank. Pipe

    'B' is 2 times more efficient than pipe 'A'. Find % of tank filled in 5 minutes by both.
    A 40% Correct Answer Incorrect Answer
    B 66.67% Correct Answer Incorrect Answer
    C 75% Correct Answer Incorrect Answer
    D 100% Correct Answer Incorrect Answer

    Solution

    Full tank time = 10 ├Ч 2 = 20 minutes AтАЩs efficiency = x units/min Tank capacity = 20x units BтАЩs efficiency = 2x units/min Work in 5 minutes = (x + 2x) ├Ч 5 = 15x units Percentage = (15x / 20x) ├Ч 100 = 75%

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