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Home Aptitude Unitary Method See What Others Are Saying!
  • Question
  • 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

  • Correct Answer
  • 13 

    Explanation

    Since 39 persons can repair a road by working 5 hours in a day in 12 days.
    ? 1 persons can repair a road by working 5 hours in a day in 39 x 12 days.
    ? 1 persons can repair a road by working 1 hours in a day in 39 x 12 x 5 days.
    ? 30 persons can repair a road by working 1 hours in a day in 39 x 12 x 5 / 30 days.
    ? 30 persons can repair a road by working 6 hours in a day in 39 x 12 x 5 / 30 x 6 days.
    ? 30 persons can repair a road by working 6 hours in a day in 39 x 2 x 1 / 6 days.
    ? 30 persons can repair a road by working 6 hours in a day in 39 x 1 x 1 / 3 days.
    ? 30 persons can repair a road by working 6 hours in a day in 13 days.


  • More questions

    • 1. 
      22.5% of 1350 + 135% of 225 =?

    • Options
    • A. 570
    • B. 610
    • C. 670
    • D. 630
    • Discuss
    • 2. 
      3 women and 18 children together take 2 days to complete a piece of work. How many days will 9 children alone take to complete the piece of work, if 6 women alone can complete the piece of work in 3 days?

    • Options
    • A. 9
    • B. 7
    • C. 5
    • D. 6
    • Discuss
    • 3. 
      How many words of 4 consonants and 3 vowels can be made from 12 consonants and 4 vowels. If all the letters are different?

    • Options
    • A. 251820
    • B. 258120
    • C. 281520
    • D. 285120
    • Discuss
    • 4. 
      12 persons are to be arranged to a round table. If two particular persons among them are not to be side by side, the total number of arrangements is?

    • Options
    • A. 9 (10!)
    • B. 2 (10!)
    • C. 45 (8!)
    • D. 10!
    • Discuss
    • 5. 
      The length of train is equal to the length of the platform. Suppose the train is running at a speed of 72 km/hr and it crosses a platform in 2 minutes. What is then the length of the train?

    • Options
    • A. 620 m
    • B. 500 m
    • C. 550 m
    • D. 600 m
    • Discuss
    • 6. 
      (15.96) 2 + 75% of 285 =?

    • Options
    • A. 435
    • B. 485
    • C. 440
    • D. 470
    • Discuss
    • 7. 
      The smallest number, which when diminished by 3, is divisible by 21, 28, 36 and 45 is?

    • Options
    • A. 420
    • B. 1257
    • C. 1260
    • D. 1263
    • Discuss
    • 8. 

      The banker's gain on a certain sum due 1 1 years hence is 3 of the banker's
      2 25

      discount. The rate percent is:


    • Options
    • A.
      5 1 %
      5
    • B.
      9 1 %
      11
    • C.
      8 1 %
      8
    • D.
      6 1 %
      6
    • Discuss
    • 9. 
      If two marbles are picked at random, what is the probability that both marbles are red?

    • Options
    • A. 1/6
    • B. 1/3
    • C. 2/15
    • D. None of the above
    • Discuss
    • 10. A and B together have Rs. 1210. If 4⁄15 of A's amount is equal to ⅖ of B's amount, how much amount does B have?

    • Options
    • A. Rs. 460
    • B. Rs. 484
    • C. Rs. 550
    • D. Rs. 664
    • Discuss


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