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    Question

    Tap A is 200% more efficient than tap B. Both the taps

    together can fill the tank in 6 hours. Find the time taken by tap C, which is 100% more efficient than tap B, to fill the tank alone.
    A 15 hrs Correct Answer Incorrect Answer
    B 18 hrs Correct Answer Incorrect Answer
    C 10 hrs Correct Answer Incorrect Answer
    D 9 hrs Correct Answer Incorrect Answer
    E 12 hrs Correct Answer Incorrect Answer

    Solution

    Let, time taken by tap B to fill the tank be x hours,
    So, time taken by tap A to fill the tank = x/3 hours According to question,
    1/x + 1/(x/3) = 1/6
    1/x + 3/x = 1/6
    x = 24 So, time taken by tap C to fill the tank = 24/2 = 12 hours

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