2. Sample Papers
  3. Railways

Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-31

  • question_answer
    Two pipes A and 8 can fill a tank in 20 min and 30 min, respectively. If both pipes are opened together, the time taken to fill the tank is

    A)  50 min

    B)         12 min

    C)  25 min

    D)  15 min

    Correct Answer: B

    Solution :

    \[\therefore \]Required time\[=\frac{1}{\frac{1}{20}+\frac{1}{30}}\] \[=\frac{20\times 30}{50}=12\,\,\min \]


You need to login to perform this action.
You will be redirected in 3 sec spinner