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SSC Sample Paper SSC CGL - Sample Paper-15

  • question_answer
    Pipes P and Q can fill a tank in 10 and 12 h respectively and C can empty it in 6 h. If all the three are opened at 7 am, at what time will one-fourth of the tank be filled?

    A) 10 am              

    B) 10 pm

    C) 11 pm              

    D) 11 am

    Correct Answer: B

    Solution :

    Part of tank filled in 1 h when all three pipes are opened \[=\frac{1}{10}+\frac{1}{12}-\frac{1}{6}\] \[=\frac{6+5-10}{60}=\frac{1}{60}\] \[\therefore \] The tank will be filled in 60 h. \[\therefore \] One fourth of the tank will be filled in 15 h i.e., the tank will be filled at 10 pm


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