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Banking Sample Paper SBI Clerk Grade (Main) Sample Test Paper-2

  • question_answer
    Two pipes can fill a tank in 12 hours and 16 hours respectively. A third pipe can empty the tank in 30 hours. If all the three pipes are opened and function simultaneously, they in how much time the tank will be full? (in hours)

    A)  \[10\frac{4}{9}\]

    B)   \[9\frac{1}{9}\]

    C)  \[8\frac{8}{9}\]

    D)   \[7\frac{2}{9}\]

    E)  \[9\frac{5}{9}\]

    Correct Answer: C

    Solution :

     When all three pipes are opened simultaneously, part of the tank filled in 1 hour \[=\frac{1}{12}+\frac{1}{16}-\frac{1}{30}\] \[=\frac{20+15-8}{240}=\frac{27}{240}\] \[\therefore \] Required time \[=\frac{240}{27}\] \[=\frac{80}{9}=8\frac{8}{9}\] hours                


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