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Home Aptitude Pipes and Cistern See What Others Are Saying!
  • Question
  • One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill tank in 36 min, then the slower pipe alone will be able to fill the tank in ?


  • Options
  • A. 85 min
  • B. 92 min
  • C. 187 min
  • D. 144 min

  • Correct Answer
  • 144 min 

    Explanation

    Let the slower pipe alone fill the tank in x min.

    Then, faster pipe will fill it in x/3 min.

    1/x + 3/x = 1/36 

    4/x = 1/36 => x = 144 min.
  • Tags: GATE, CAT, Bank Exams, Bank PO, Bank Clerk

    More questions

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      A man buys 3 cows and 18 goats in ? 47,200. Instead if he would have bought 8 cows and 3 goats, he had to pay ? 53,000 more. Cost of one cow is:

    • Options
    • A. ? 10,000
    • B. ? 11,000
    • C. ? 12,000
    • D. ? 13,000
    • Discuss
    • 2. Six years ago, the ratio of the ages of Kunal and Sagar was 6 : 5. Four years hence, the ratio of their ages will be 11 : 10. What is Sagar's age at present?

    • Options
    • A. 16 years
    • B. 18 years
    • C. 20 years
    • D. Cannot be determined
    • E. None of these
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    • 3. 
      (17.28 ÷? ) / (3.6 x 0.2) = 2

    • Options
    • A. 120
    • B. 1.20
    • C. 12
    • D. 0.12
    • Discuss
    • 4. 
      If a, b and c are non-zero, a + (1/b) = 1 and b + (1/c) = 1, then the value of abc is

    • Options
    • A. -3
    • B. 1
    • C. -1
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    • 5. 
      A ladder 15 m long reaches a window which is 9 m above the ground on one side of street. Keeping its foot at the same point, the ladder is turned to the other side of the street to reach a window 12 m high. What is the width of the street:

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    • B. 12 m
    • C. 30 m
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    • 6. 
      4, 2, 3.5, 7.5, 26.25, 118.125

    • Options
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    • 7. 
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    • Options
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