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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-32

  • question_answer
    A boy and girl together fill a cistern with water. The boy pours 4 L of water every 3 min and the girl pours 3 L every 4 min. How much time will it take to fill 100 L of water in the cistern?

    A)  36 min

    B)  42 min

    C)  48 min

    D)  44 min

    Correct Answer: C

    Solution :

    Water filled by the boy and girl in 1 min \[=\frac{4}{3}+\frac{3}{4}=\frac{16+9}{12}=\frac{25}{12}\,\,L\] \[\therefore \]Time taken to fill 100 L = ?- x 12 = 48 min


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