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  • Question
  • A tap can fill a tank in 6 hours. After half the tank is filled three more similar taps are opened. What is the total time taken to fill the tank completely ?


  • Options
  • A. 4 hrs 15 min
  • B. 3 hrs 24 min
  • C. 4 hrs 51 min
  • D. 3 hrs 45 min

  • Correct Answer
  • 3 hrs 45 min 

    Explanation

    Time taken by one tap to fill half of the tank = 3 hrs.

    Part filled by the taps in 1 hour = 4 x 1/6 = 2/3

    Remaining part = 1 - 1/2 = 1/2

    2/3 : 1/2 :: 1 : p

    p = 1/2 x 1 x 3/2 = 3/4 hrs. i.e., 45 min

    So, total time taken = 3 hrs 45 min.

  • Tags: AIEEE, Bank Exams, CAT, GATE, Bank Clerk, Bank PO

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