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SSC Sample Paper Mock Test-18 SSC CGL Tear-II Paper-1

  • question_answer
    Two pipes A and B can fill a tank in 24 h and 30 h respectively. If both the pipes are opened simultaneously in the empty tank, how much time will be taken by them to fill it?

    A)                 13 h 20 min

    B)         11 h 15 min       

    C)  9 h 25 min       

    D)  15 h 25 min 

    Correct Answer: A

    Solution :

    Part filled by A in 1 h \[=\frac{1}{24},\]Part filled by B in 1 h \[=\frac{1}{30}\] Part filled by (A+B) in 1 h \[=\left( \frac{1}{24}+\frac{1}{30} \right)=\frac{9}{120}=\frac{3}{40}\] Time taken by both to fill the tank\[=\frac{40}{3}\text{h}\]= 13 h 20 min


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