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Home Aptitude Volume and Surface Area See What Others Are Saying!
  • Question
  • The curved surface area of a cylindrical pillar is 264 m2 and its volume is 924 m3. Find the ratio of its diameter to its height.


  • Options
  • A. 3 : 7
  • B. 7 : 3
  • C. 6 : 7
  • D. 7 : 6

  • Correct Answer
  • 7 : 3 

    Explanation
    Πr2h = 924     ⟹     r = 924 x 2 = 7 m.
    rh 264 264

    And, 2Πrh = 264     ⟹     h = 264 x 7 x 1 x 1 = 6m.
    22 2 7

    ∴ Required ratio = 2r = 14 = 7 : 3.
    h 6

  • More questions

    • 1. 
      At a game of billiards A can give B 6 points in 50 and he can give C 13 points in 65, how many points can B give C in a game of 55?

    • Options
    • A. 7
    • B. 8
    • C. 5
    • D. 10
    • Discuss
    • 2. The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person?

    • Options
    • A. 76 kg
    • B. 76.5 kg
    • C. 85 kg
    • D. Data inadequate
    • E. None of these
    • Discuss
    • 3. 
      Three men Ram, Karan and Mohan run around an oval garden from a fixed post at the rates of 5, 5 1? 7, 5 1? 3 per hour. They come back to the fixed post in 3 3? 4 hours. Find the greatest length, the race course can have.

    • Options
    • A. 28 / 5 km
    • B. 5 / 28 km
    • C. 11 / 28 km
    • D. 28 / 11 km
    • Discuss
    • 4. 
      Value of ?5 + 2?6 - 1/?5 - 2?6 is

    • Options
    • A. 2?2
    • B. 0
    • C. 2?3
    • D. ?5 - 1
    • Discuss
    • 5. The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 km in 4 hours, then the speed of the first train is:

    • Options
    • A. 70 km/hr
    • B. 75 km/hr
    • C. 84 km/hr
    • D. 87.5 km/hr
    • Discuss
    • 6. 
      The present ages of Vikas and Vishal are in the ratio 15:8. After ten years , their ages will be in the ratio 5:3. Find their present ages

    • Options
    • A. 60 years, 32 years
    • B. 32 years,60 years
    • C. 15 years,8 years
    • D. 8 years,15 years
    • Discuss
    • 7. 
      A person on tour has total ?360 for his daily expenses. He decides to extend his tour programme by 4 days which leads to cutting down daily expenses by ?3 a day . The numbers of days of tour are :

    • Options
    • A. 15
    • B. 20
    • C. 18
    • D. 16
    • Discuss
    • 8. 
      7 6n - 6 6n, where n is an integer greater than 0, is divisible by

    • Options
    • A. 13
    • B. 127
    • C. 559
    • D. None of these
    • Discuss
    • 9. 
      A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 252 seconds, B in 308 seconds and C in 198 seconds, all starting at the same point. After what time will they meet next at the starting point again?


    • Options
    • A. 46 minutes 12 seconds
    • B. 45 minutes
    • C. 42 minutes 36 seconds
    • D. 26 minutes 18 seconds
    • Discuss
    • 10. 
      If n is any odd number greater than 1, then n( n 2 -1 ) is

    • Options
    • A. divisible by 96 always
    • B. divisible by 48 always
    • C. divisible by 24 always
    • D. None of these
    • Discuss


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