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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 the tank in 36 min, then the slower alone will be able to fill the tank in:


  • Options
  • A. 81 min
  • B. 108 min
  • C. 144 min
  • D. 192 min

  • Correct Answer
  • 144 min 

    Explanation

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

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

    = > 1 x + 3 x = 1 36   = > 4 x = 1 36   = > x = 144 m i n s


  • More questions

    • 1. 
      The angle of elevation of the top of a tower standing on a horizontal plane from a point A is ?. After walking a distance a towards the foot of the tower, the angle of elevation is found to be ?. The height of the tower is :

    • Options
    • A. a Sin ? Sin ?/ Sin(? - ?)
    • B. a Sin ? Sin ?/Sin(? - ?)
    • C. a Sin( ? - ? ) Sin ? Sin ?
    • D. a Sin(? - ?)/Sin ?Sin ?
    • Discuss
    • 2. 
      The number of different permutations of the word 'BANANA' is?

    • Options
    • A. 270
    • B. 60
    • C. 120
    • D. 360
    • Discuss
    • 3. A man buys a watch for Rs. 1950 in cash and sells it for Rs. 2200 at a credit of 1 year. If the rate of interest is 10% per annum, the man:

    • Options
    • A. gains Rs. 55
    • B. gains Rs. 50
    • C. loses Rs. 30
    • D. gains Rs. 30
    • Discuss
    • 4. 
      39 persons can repair a road in 12 days, working 5 hours a day. In how many days will 30 persons, working 6 hours a day, complete the work?

    • Options
    • A. 10
    • B. 13
    • C. 18
    • D. 136
    • Discuss
    • 5. In a game of 100 points, A can give B 20 points and C 28 points. Then, B can give C:

    • Options
    • A. 8 points
    • B. 10 points
    • C. 14 points
    • D. 40 points
    • Discuss
    • 6. In covering a distance of 30 km, Abhay takes 2 hours more than Sameer. If Abhay doubles his speed, then he would take 1 hour less than Sameer. Abhay's speed is:

    • Options
    • A. 5 kmph
    • B. 6 kmph
    • C. 6.25 kmph
    • D. 7.5 kmph
    • Discuss
    • 7. 
      If 45 m of a uniform rod weight 171 kg, then what will be the weight of 12 m of the same rod?

    • Options
    • A. 49 kg
    • B. 42.5 kg
    • C. 55 kg
    • D. 45.6 kg
    • Discuss
    • 8. 
      A company has issued 10000 preferred shares and 50000 common shares both of par value $ 100 each. The dividend on a preferred share and a common share is 12% and 17.6%, respectively. The company had a total profit of $ 15 Millions, out of which some amount was kept in reserve fund and the remaining distributed as dividend. Find out the amount kept in reserve fund.

    • Options
    • A. $ 5 Million
    • B. $ 6 Million
    • C. $ 6.5 Million
    • D. $ 5.5 Million
    • Discuss
    • 9. 
      If a certain sum is doubled in 8 yr on simple interest, in how many year will it be four times?

    • Options
    • A. 24 yr
    • B. 16 yr
    • C. 32 yr
    • D. 12 yr
    • Discuss
    • 10. 
      The sum of three consecutive odd numbers is 20 more than the first of these numbers.What is the middle number?

    • Options
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    • D. Data inadequate
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